Two Tunnels Marathon
Bath, Somerset
16 Aug 2026
⚠ Start times change frequently. Always check with race organiser or their website for this year's confirmed start time before travelling.
Course map
Map adapted from official race's website
Elevation profile
About this race
The Two Tunnels Marathon starts and finishes at Brickfields Park in Bath and is run over two laps of the "City Ticket" half marathon course. Runners head out through both the Devonshire and Combe Down railway tunnels before following the Kennet & Avon Canal into the heart of the city, passing Sydney Gardens, Cleveland House and Pulteney Bridge, with the route running close to Bath Abbey and Pulteney Weir. The surface is a solid mix of tarmac, canal towpath and riverside path rather than trail, and the course is flat throughout, though not officially measured for record purposes. With nine feast stations on course and a three-hour cut-off to start the second lap, it combines the city's grandest architecture with its hidden underground tunnels, giving runners a genuinely unique tour of Bath across the full marathon distance.
Course profile & record eligibility
World Athletics record-eligibility rules cap net elevation loss at 1m per km of race distance, and require the start and finish to be no more than 50% of the race distance apart — both meant to stop a course gaining an unfair edge from downhill grade or a point-to-point tailwind. This is based on this course's recorded elevation and GPS data, not an official measurement or certification.