IRONMAN 70.3 Bolton 2027
A 70.3 in Bolton with a swim in Pennington Flash, a hilly bike with 840 m of climbing and a two-lap run around the town centre and through Queen's Park.
35 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 organiser gives 840 m of climbing on the bike and the run climbs through Queen's Park, so include hilly brick sessions and practise running on tired legs.”
The race
The course
Swim in Pennington Flash Country Park. Wetsuits are legal at 24.5°C (76.1°F) or colder, up to 5 mm thick, and prohibited above that.
Two loops through the villages of Lowton, Abram and Bickershaw, then north toward Bolton on roads familiar from previous IRONMAN UK races, with 840 m of climbing (organiser figure).
Two laps around Bolton town centre, climbing through Queen's Park onto Chorley New Road.
Not yet confirmed for this edition: cut-off times, aid station spacing, water temperature history, course maps (not checked against official GPX), bike lap count. 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 IRONMAN 70.3 Bolton course page on 4 October 2026. Courses change; the official page is always the last word.
Questions, answered
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What is the swim like?
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Read before you race
Half Ironman Recovery Time: A Practical Return
How Much Harder Is a Full IRONMAN Than a 70.3?
IRONMAN 70.3 Tallinn Training Guide
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This listing is for information only. Unbroken is not affiliated with, endorsed by, or sponsored by IRONMAN 70.3 Bolton 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 entry, always use the official event website.