Castle Triathlon Blog: Hever Castle Olympic Distance – Race Tips

Castle Triathlon Blog: Hever Castle Olympic Distance – Race Tips

The Olympic race distance at Hever Castle is well known amongst athletes as being one of the most physically challenging races on the Castle Triathlon circuit. With a technical swim that sees you weave through the small canals of Hever’s lake, a lumpy bike ride through the Kent countryside and an energy-sapping run around the castle grounds, there is plenty to think about to produce your best performance. As a local and veteran of the Hever Triathlon, who has won over both the Olympic and Gauntlet courses, here are my 5 top tips to take on the course:

  • Sighting in the swim – with the Olympic Distance race taking place in the morning, the sun is usually low in the sky as you enter the water, making it difficult to see out across the lake once you’re in the water. I would recommend investing in a pair of mirrored goggles which will reflect some of that glare from the sun and allow you to spot the buoys, as well as making it easier to negotiate the meandering canals at the back end of the swim leg.
  • Early climb on the bike – after you have got through T1 and exited the castle grounds you will hit a short downhill section before taking a sharp left at the T-junction and being faced with a gradual 7-8-minute climb. This can be difficult so soon after the swim when a lot of your blood hasn’t yet reached your legs, I would recommend building into the climb starting out in an easier gear and saving a little energy for later in the climb where the gradient gets a little steeper.
  • Off-road running – like most of the Castle Series races, the majority of the 10k run takes place within the castle grounds and features a variety of trails through muddy woods and grassy fields. If the weather is wet some of these paths can become slippery, so I would recommend wearing trainers with slightly more tread on the bottom to give you more grip when going uphill and more confidence when attacking the downhill sections.
  • Pacing on the bike and run – one of best bits of advice I could give would be to race this course with a more conservative mindset than you would on a flatter, faster course. With the amount of small sharp climbs on both the bike and run, powering up every one of them as hard as you can will come back to bite you in the later stages of the race. Trying to maintain a steady effort level on each climb and recovering on the downhill sections will serve you much better in the long run.
  • Nutrition – as I mentioned previously, the Hever Course is more challenging than your normal flat triathlon course, so your overall finish time could be 10-20 minutes slower than your usual Olympic Distance race. You will, therefore, need to factor this into your nutrition strategy. This could involve making sure you take on extra water at aid stations, especially if it is a hot day, or taking an extra gel on the bike or run to ensure your body has enough fuel to get to that finish line.

I hope these tips are of some use to you come race day and I wish you all the best of luck! If you see me at a Castle Series race in the future please do come and say hi.

Written by Sam Wade, for Zone3

Edited by Catharyne Walton-Matthews

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zone3official
18/06/25
What a weekend up at Windermere 💦⛰️ The Great North Swim brought big energy, beautiful scenery, and plenty of Zone3 kit in the water. We had an awesome crew of ambassadors taking on the 5km swim, shoutout to @livs_is_livs who did it in skins 👏 and to @chloedooley who showed up and gave it everything. And a massive congrats to Zone3 Pro @j0m3sf1 for taking the win in the SwimRun - absolutely flying out there, despite the weather warnings! Open water season is officially on, and we’re buzzing to be part of it. @great_swim
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zone3official
15/06/25
What a weekend at the Great North Swim in Windermere! As proud swim sponsors, we loved being part of the action. Even with the odd downpour, spirits stayed high and the atmosphere was electric - a true celebration of community, determination, and open water adventure.
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zone3official
10/06/25
This weekend, the Zone3 team also volunteered at the incredible 24-Hour Swim Relay at Shepperton @levelwateruk 🏊‍♀️ We're proud to support Level Water, a charity that gives children with disabilities the opportunity to learn to swim, offering 1-to-1 lessons that empower kids with confidence, movement, and freedom in the water. The 24 hour event brought swimmers together for a non-stop relay challenge, raising vital funds to provide these lessons across the UK. To everyone swimming, supporting, and staying awake through the night: thank you for making a difference. This is what sport is all about.
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zone3official
10/06/25
This weekend, the Zone3 team also volunteered at the incredible 24-Hour Swim Relay at Shepperton @levelwateruk 🏊‍♀️ We're proud to support Level Water, a charity that gives children with disabilities the opportunity to learn to swim, offering 1-to-1 lessons that empower kids with confidence, movement, and freedom in the water. The 24 hour event brought swimmers together for a non-stop relay challenge, raising vital funds to provide these lessons across the UK. To everyone swimming, supporting, and staying awake through the night: thank you for making a difference. This is what sport is all about.
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zone3official
10/06/25
This weekend, the Zone3 team also volunteered at the incredible 24-Hour Swim Relay at Shepperton @levelwateruk 🏊‍♀️ We're proud to support Level Water, a charity that gives children with disabilities the opportunity to learn to swim, offering 1-to-1 lessons that empower kids with confidence, movement, and freedom in the water. The 24 hour event brought swimmers together for a non-stop relay challenge, raising vital funds to provide these lessons across the UK. To everyone swimming, supporting, and staying awake through the night: thank you for making a difference. This is what sport is all about.
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zone3official
09/06/25
Blenheim Palace Triathlon delivered everything we love about race season - historic backdrops, electric energy, and a community of athletes pushing themselves to new limits 🏁 As Official Swim Sponsor, we were proud to support one of the UK’s most iconic triathlons. The Zone3 kit was out in force, powered by the passion of our ambassador team and the dedication of every single participant! 👉 Swipe to see our fave visitor of the weekend @blenheimpalacetriathlon
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zone3official
09/06/25
Blenheim Palace Triathlon delivered everything we love about race season - historic backdrops, electric energy, and a community of athletes pushing themselves to new limits 🏁 As Official Swim Sponsor, we were proud to support one of the UK’s most iconic triathlons. The Zone3 kit was out in force, powered by the passion of our ambassador team and the dedication of every single participant! 👉 Swipe to see our fave visitor of the weekend @blenheimpalacetriathlon
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zone3official
09/06/25
Blenheim Palace Triathlon delivered everything we love about race season - historic backdrops, electric energy, and a community of athletes pushing themselves to new limits 🏁 As Official Swim Sponsor, we were proud to support one of the UK’s most iconic triathlons. The Zone3 kit was out in force, powered by the passion of our ambassador team and the dedication of every single participant! 👉 Swipe to see our fave visitor of the weekend @blenheimpalacetriathlon
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zone3official
09/06/25
Blenheim Palace Triathlon delivered everything we love about race season - historic backdrops, electric energy, and a community of athletes pushing themselves to new limits 🏁 As Official Swim Sponsor, we were proud to support one of the UK’s most iconic triathlons. The Zone3 kit was out in force, powered by the passion of our ambassador team and the dedication of every single participant! 👉 Swipe to see our fave visitor of the weekend @blenheimpalacetriathlon
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zone3official
09/06/25
Blenheim Palace Triathlon delivered everything we love about race season - historic backdrops, electric energy, and a community of athletes pushing themselves to new limits 🏁 As Official Swim Sponsor, we were proud to support one of the UK’s most iconic triathlons. The Zone3 kit was out in force, powered by the passion of our ambassador team and the dedication of every single participant! 👉 Swipe to see our fave visitor of the weekend @blenheimpalacetriathlon
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zone3official
09/06/25
Blenheim Palace Triathlon delivered everything we love about race season - historic backdrops, electric energy, and a community of athletes pushing themselves to new limits 🏁 As Official Swim Sponsor, we were proud to support one of the UK’s most iconic triathlons. The Zone3 kit was out in force, powered by the passion of our ambassador team and the dedication of every single participant! 👉 Swipe to see our fave visitor of the weekend @blenheimpalacetriathlon
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zone3official
09/06/25
Blenheim Palace Triathlon 2025 brought together athletes, ambition, and the unmistakable energy of race season. 💥 As the Official Swim Sponsor, Zone3 was proud to support the event which included the British and English Sprint Distance Championships and GB Age-Group Team Qualifier. With athletes of every level pushing their limits and our ambassadors leading from the front, it was a weekend to remember. The rain came down, but the spirit? Unshakeable. The determination? Unstoppable. The atmosphere? Electric ⚡ From first-time triathletes to GB hopefuls, every stroke, step, and smile was a reminder of why we do this. Thanks to everyone who stopped by to chat! And huge kudos to everyone who raced! @blenheimpalacetriathlon
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zone3official
23/05/25
Planning a staycation with open-water swims on the agenda? Don’t hit the road without these 5 holiday essentials that blend performance, comfort, and innovation, whether you're taking the plunge or soaking in the scenery. 🧭 1. Zone3 Waterproof Phone Pouch Stay safe + snap the moment. This buoyant, watertight pouch keeps your phone sealed from the elements while floating beside you for easy access:GPS, safety calls or that post-swim selfie, sorted. 🏖 2. Swim Safety Buoy Not just for visibility, our buoys offer a float to grab hold of when you need a breather in the water, plus are in-water storage for your dry kit and valuables. They're lightweight, eco-conscious, and swimmer-approved for peace of mind. 🕶 3. Waterhaul x Zone3 Sunglasses Sustainably made from ocean plastic and engineered for active wear, these polarised shades reduce glare off the water and keep you looking sharp on swim breaks. 🫖 4. Zone3 Ocean Bottle Hydration with a mission. This vacuum-insulated bottle keeps drinks cold (or hot) and supports ocean cleanup with every purchase. Perfect for post-dip teas or mid-hike refreshment. 🧥 5. Thermo-Tech Changing Robe From freezing lakes to rainy beaches, this super-insulated robe wraps you in warmth while you change. Windproof, water-resistant and cosy enough to live in between swims. 💬 Got a UK swim spot to recommend? Drop your favourite below and let the community know where you’re diving in next 👇
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zone3official
23/05/25
Planning a staycation with open-water swims on the agenda? Don’t hit the road without these 5 holiday essentials that blend performance, comfort, and innovation, whether you're taking the plunge or soaking in the scenery. 🧭 1. Zone3 Waterproof Phone Pouch Stay safe + snap the moment. This buoyant, watertight pouch keeps your phone sealed from the elements while floating beside you for easy access:GPS, safety calls or that post-swim selfie, sorted. 🏖 2. Swim Safety Buoy Not just for visibility, our buoys offer a float to grab hold of when you need a breather in the water, plus are in-water storage for your dry kit and valuables. They're lightweight, eco-conscious, and swimmer-approved for peace of mind. 🕶 3. Waterhaul x Zone3 Sunglasses Sustainably made from ocean plastic and engineered for active wear, these polarised shades reduce glare off the water and keep you looking sharp on swim breaks. 🫖 4. Zone3 Ocean Bottle Hydration with a mission. This vacuum-insulated bottle keeps drinks cold (or hot) and supports ocean cleanup with every purchase. Perfect for post-dip teas or mid-hike refreshment. 🧥 5. Thermo-Tech Changing Robe From freezing lakes to rainy beaches, this super-insulated robe wraps you in warmth while you change. Windproof, water-resistant and cosy enough to live in between swims. 💬 Got a UK swim spot to recommend? Drop your favourite below and let the community know where you’re diving in next 👇
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zone3official
23/05/25
Planning a staycation with open-water swims on the agenda? Don’t hit the road without these 5 holiday essentials that blend performance, comfort, and innovation, whether you're taking the plunge or soaking in the scenery. 🧭 1. Zone3 Waterproof Phone Pouch Stay safe + snap the moment. This buoyant, watertight pouch keeps your phone sealed from the elements while floating beside you for easy access:GPS, safety calls or that post-swim selfie, sorted. 🏖 2. Swim Safety Buoy Not just for visibility, our buoys offer a float to grab hold of when you need a breather in the water, plus are in-water storage for your dry kit and valuables. They're lightweight, eco-conscious, and swimmer-approved for peace of mind. 🕶 3. Waterhaul x Zone3 Sunglasses Sustainably made from ocean plastic and engineered for active wear, these polarised shades reduce glare off the water and keep you looking sharp on swim breaks. 🫖 4. Zone3 Ocean Bottle Hydration with a mission. This vacuum-insulated bottle keeps drinks cold (or hot) and supports ocean cleanup with every purchase. Perfect for post-dip teas or mid-hike refreshment. 🧥 5. Thermo-Tech Changing Robe From freezing lakes to rainy beaches, this super-insulated robe wraps you in warmth while you change. Windproof, water-resistant and cosy enough to live in between swims. 💬 Got a UK swim spot to recommend? Drop your favourite below and let the community know where you’re diving in next 👇
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zone3official
23/05/25
Planning a staycation with open-water swims on the agenda? Don’t hit the road without these 5 holiday essentials that blend performance, comfort, and innovation, whether you're taking the plunge or soaking in the scenery. 🧭 1. Zone3 Waterproof Phone Pouch Stay safe + snap the moment. This buoyant, watertight pouch keeps your phone sealed from the elements while floating beside you for easy access:GPS, safety calls or that post-swim selfie, sorted. 🏖 2. Swim Safety Buoy Not just for visibility, our buoys offer a float to grab hold of when you need a breather in the water, plus are in-water storage for your dry kit and valuables. They're lightweight, eco-conscious, and swimmer-approved for peace of mind. 🕶 3. Waterhaul x Zone3 Sunglasses Sustainably made from ocean plastic and engineered for active wear, these polarised shades reduce glare off the water and keep you looking sharp on swim breaks. 🫖 4. Zone3 Ocean Bottle Hydration with a mission. This vacuum-insulated bottle keeps drinks cold (or hot) and supports ocean cleanup with every purchase. Perfect for post-dip teas or mid-hike refreshment. 🧥 5. Thermo-Tech Changing Robe From freezing lakes to rainy beaches, this super-insulated robe wraps you in warmth while you change. Windproof, water-resistant and cosy enough to live in between swims. 💬 Got a UK swim spot to recommend? Drop your favourite below and let the community know where you’re diving in next 👇
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zone3official
23/05/25
Planning a staycation with open-water swims on the agenda? Don’t hit the road without these 5 holiday essentials that blend performance, comfort, and innovation, whether you're taking the plunge or soaking in the scenery. 🧭 1. Zone3 Waterproof Phone Pouch Stay safe + snap the moment. This buoyant, watertight pouch keeps your phone sealed from the elements while floating beside you for easy access:GPS, safety calls or that post-swim selfie, sorted. 🏖 2. Swim Safety Buoy Not just for visibility, our buoys offer a float to grab hold of when you need a breather in the water, plus are in-water storage for your dry kit and valuables. They're lightweight, eco-conscious, and swimmer-approved for peace of mind. 🕶 3. Waterhaul x Zone3 Sunglasses Sustainably made from ocean plastic and engineered for active wear, these polarised shades reduce glare off the water and keep you looking sharp on swim breaks. 🫖 4. Zone3 Ocean Bottle Hydration with a mission. This vacuum-insulated bottle keeps drinks cold (or hot) and supports ocean cleanup with every purchase. Perfect for post-dip teas or mid-hike refreshment. 🧥 5. Thermo-Tech Changing Robe From freezing lakes to rainy beaches, this super-insulated robe wraps you in warmth while you change. Windproof, water-resistant and cosy enough to live in between swims. 💬 Got a UK swim spot to recommend? Drop your favourite below and let the community know where you’re diving in next 👇
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Z
zone3official
23/05/25
Planning a staycation with open-water swims on the agenda? Don’t hit the road without these 5 holiday essentials that blend performance, comfort, and innovation, whether you're taking the plunge or soaking in the scenery. 🧭 1. Zone3 Waterproof Phone Pouch Stay safe + snap the moment. This buoyant, watertight pouch keeps your phone sealed from the elements while floating beside you for easy access:GPS, safety calls or that post-swim selfie, sorted. 🏖 2. Swim Safety Buoy Not just for visibility, our buoys offer a float to grab hold of when you need a breather in the water, plus are in-water storage for your dry kit and valuables. They're lightweight, eco-conscious, and swimmer-approved for peace of mind. 🕶 3. Waterhaul x Zone3 Sunglasses Sustainably made from ocean plastic and engineered for active wear, these polarised shades reduce glare off the water and keep you looking sharp on swim breaks. 🫖 4. Zone3 Ocean Bottle Hydration with a mission. This vacuum-insulated bottle keeps drinks cold (or hot) and supports ocean cleanup with every purchase. Perfect for post-dip teas or mid-hike refreshment. 🧥 5. Thermo-Tech Changing Robe From freezing lakes to rainy beaches, this super-insulated robe wraps you in warmth while you change. Windproof, water-resistant and cosy enough to live in between swims. 💬 Got a UK swim spot to recommend? Drop your favourite below and let the community know where you’re diving in next 👇
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zone3official
14/05/25
Are you ready for the Arla Great North Swim in June? @zone3official takes you through ‘sighting’ in open water, so you swim in the right direction and don’t zig zag your way around. Practicing sighting before the event will make sure you swim in a straight line and ensures you don’t swim further than you need to on the day. If you’re swimming in the pool, why not grab a bottle and use it as a marker at the end of your lane. Try to lift your eyes or head to look at it every few strokes. If you can practice in the open water, a landmark in the distance is a good marker to swim towards too! #openwaterswimming #zone3 #zone3official #greatnorthswim2025
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zone3official
01/05/25
Introducing the all-new Glide Wetsuit — engineered to help new triathletes and open-water swimmers feel fast, supported, and in control from their first swim to their final stroke. Whether you're stepping into open water for the first time or building confidence ahead of race day, Glide is your perfect entry point. Its performance-enhancing design combines flexibility where it counts, balanced buoyancy, and durable comfort, helping you conserve energy, swim naturally, and stay focused on your goals. Comment 'Glide' for more info sent straight to your DMs.
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zone3official
01/05/25
Introducing the all-new Glide Wetsuit — engineered to help new triathletes and open-water swimmers feel fast, supported, and in control from their first swim to their final stroke. Whether you're stepping into open water for the first time or building confidence ahead of race day, Glide is your perfect entry point. Its performance-enhancing design combines flexibility where it counts, balanced buoyancy, and durable comfort, helping you conserve energy, swim naturally, and stay focused on your goals. Comment 'Glide' for more info sent straight to your DMs.
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