UK Triathlon Racing in May 2026: Your Complete Events Guide

May marks the point when the UK triathlon season truly gets going. After the season-opener duathlons in March, May brings a wave of swim-bike-run events across England, Scotland, and Wales — sprints, standards, and aquathlons for every level. Here is your guide to the key races to enter for May 2026, whether you are targeting your first podium or simply looking to tick off a PB before the summer peaks.

Early May: Get Your Season Rolling

• St Neots Triathlon Series Race 1 — 3 May 2026, East England. One of the most popular club-level sprint and standard series in the UK. Ideal for a season opener.
• Tavistock Triathlon — 3 May 2026, South West. Hilly and challenging Devon course — not one to underestimate on the bike.
• Horwich Triathlon and Multisport — 3 May 2026, North West. Pool swim entry point for beginners getting their first race experience.

Mid-May: Build Your Confidence

• Barony Park Triathlon — 10 May 2026, Scotland. A rare Scottish standard distance event with open water swim and a flat, fast bike course.
• National Water Sports Centre Triathlon — 16–17 May 2026, Nottingham. A two-day event at Holme Pierrepont — home to British Triathlon Championships racing in previous years and reliably well-organised.
• Bellahouston Park Triathlon — 16 May 2026, Glasgow. A popular city-based event for Scottish athletes looking for early season points.

Late May: Sprint for a PB

• One on the River Aquabike — Marlow — 24 May 2026. A growing aquabike (swim-bike only) format on the Thames — perfect for cyclists who want to race without the run pressure.
• Northumberland Festival of Sport Triathlon — 31 May 2026. Standard distance in beautiful Northumberland countryside — one for those chasing scenic PB conditions.
• Henley Triathlon — 30–31 May 2026, Oxfordshire. Classic river swim, rolling Chilterns bike, town centre run. A summer highlight on the southern England calendar.

How to Enter UK Triathlons in 2026

Most British Triathlon-affiliated events require a current British Triathlon membership or a day licence, which can be purchased at registration. Enter via the event organiser’s website or through platforms such as Let’s Do This or British Triathlon’s own events search. Sprint distances typically sell out fastest — if you see a race that fits your schedule, register early rather than waiting for closer to the date.