Two Tunnels Races
Bath, United Kingdom • 9 Aug 2026
Event overview
Bath Two Tunnels Railway Races is a multi-distance running event organised by Relish Running Races at Brickfields Park, Twerton, Bath. The course uses former railway paths and tunnels and includes road, path and tarmac surfaces. The event attracts reviews and has an aggregate rating of 4.6 from 82 reviews.
Distances available
- 50 km
- Marathon (26.2 mi)
- Half marathon
- 10 km
- 5 km
- 2 km Fun Run
- 500 m Colourburst Run
The route runs through the former Somerset & Dorset Railway tunnels and alongside the Kennet & Avon Canal, then into central Bath past the Abbey and Pulteney Weir. The 5 km includes the 408 m Devonshire Tunnel into Lyncombe Vale and a turnaround near the Combe Down Tunnel. The 10 km is described as a flat, tarmac course with only a 2% gradient; the 50 km is run as five 10 km laps on a certified route and the marathon is run over two laps.
On-course and event facilities include finisher medals, prizes for top finishers, fresh fruit and treats, timed results, drink stations and first aid. There are onsite toilets, coffee and food vans and a bag drop; organisers provide bag transport for certain long-distance runners. Drink stations: none on the 5 km, one aid station for the 10 km, and 3–5 checkpoints on the half marathon offering water, electrolytes and snacks.
Age and participation notes: minimum ages listed for some distances are 10 km 16+, half marathon 17+, 25 km 18+, marathon 18+ and 50 km 20+. Buggy runners are permitted in the 50 km, 10 km and 5 km events; canicross is not allowed. Visit the organization's website for the most recent information.