Two Tunnels 5km, 10km, Half, Marathon & 50km

The Two Tunnels running race series in Bath offers multiple distances including Colourburst, 5km, 10km, Half Marathon, Marathon and 50km, with entries available for several 2026 and 2027 event dates at Brickfields Park.

Two Tunnels 5km, 10km, Half, Marathon & 50km is a running race series in Bath with multiple distances available, starting and finishing at Brickfields Park, Bath.

Event dates: 7th June 2026, 16th August 2026 and 21st February 2027.

Start times: Starts are from 10:00. Colourburst runs and Ultra runs start earlier; see the provisional schedule for details.

Location: Brickfields Park, Bath, BA2 1LX (no on-site parking). What3Words: joke.rock.banana.

• Distances offered: Colourburst, 5km, 10km, Half Marathon, Marathon, 50km Solo, 50km Pair, 5x10km Relay, 2km, 500m Colourburst
• Course notes: Several distances are officially measured by UK Athletics (Marathon is not officially measured).
• Cut-offs: Marathon: 3hr cut-off to start lap 2; 50km: 8.5hr cut-off; other distances have no cut-offs (run/jog/walk is welcome; not open to pure walkers).
• Facilities: Toilets, coffee and food vans, bag drop (no changing rooms).
• Aid stations: No drinks station on the 5km; increasing support on longer distances with water, electrolytes and food options including GF/DF/vegan snacks.
• Medals: 5km and longer finishers receive a large event-specific medal.
• Transport: Suggested parking at Odd Down Park & Ride (BA2 8PA) with shuttle bus; nearest station Oldfield Park (800m), Bath Spa ~2 miles.

Prices: Colourburst £10–£12; 5km £26; 10km £32; Half Marathon £46; Marathon £60; 50km Solo £65; 50km Pair £80; 5x10km Relay £150. UK Athletics affiliated runners receive a £2 discount; on-the-day registration is £2 extra.