Belvoir Castle Triathlon 2027
The Castle Series in the Vale of Belvoir. A lake swim below the castle, rolling Leicestershire lanes, and a run that climbs back up to the castle itself.
48 weeks to race day: base season
Plenty of runway. This far out, the win is a boring, consistent base rhythm: aerobic volume, strength, technique. The structured block starts closer in; what you do now decides how high it can climb.
Building for this one? 70.3 training plan covers the sessions, the weekly shape and how the block is paced. The R.A.C.E. Framework explains why it is built that way.
Build my complete road.
Commit to the date and the work gets a shape: your countdown starts, the emails arrive in step with your build, and the app anchors a recovery-led block so the final week lands exactly on race day.
One confirmation email, then the road begins. Registering for the race itself stays with the organiser.
“The castle sits on a ridge, which tells you how the run finishes. Save something for the last climb, because it comes when you have nothing left.”
The race
The course
No course maps for this race. The organiser publishes no downloadable route for any leg of this race, so there is nothing to draw a course map from. Everything below comes from the official course page, checked on the date at the foot of this section.
The estate lake directly below Belvoir Castle. One swim map covers the whole weekend rather than a course per distance.
Two laps of the Vale of Belvoir circuit. The organiser's longest linked cycle route is labelled 45K and measures 46.4km, so the half distance is two laps of it. Shorter races use 20km and 13km routes.
Two laps of the 10.5km route, which measures 10.5km on the organiser's own map. The weekend also runs 5km, 4km and 2.5km versions.
Not yet confirmed for this edition: swim lap count, elevation gain, cut-off times, water temperature, transition locations. We publish these only once they are on the official course page, so check there before you pace off anything here.
Course details verified against the official Belvoir Castle Triathlon course page on 14 August 2026. Courses change; the official page is always the last word.
Questions, answered
When is Belvoir Castle Triathlon 2027?
What distances can I race at Belvoir Castle Triathlon?
How hard is the course?
What is the swim like?
How long do I need to train for it?
How do I enter?
Read before you race
IRONMAN 70.3 Tallinn Training Guide
How Much Harder Is a Full IRONMAN Than a 70.3?
Your First Triathlon.
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Photograph of Grantham, Leicestershire: Nancy, CC BY-SA 4.0, via Wikimedia Commons. Not official race photography.
This listing is for information only. Unbroken is not affiliated with, endorsed by, or sponsored by Belvoir Castle Triathlon or its organiser. Details are based on publicly available information; names are used descriptively to identify the event. For accurate, up-to-date information and to enter, always use the official event website.