The Tunnel Marathon - Portsmouth

Portsmouth, United Kingdom • 30 Nov 2024

The Tunnel Marathon, set to take place at the UCAP Bunker near Portsmouth, is the UK's first fully underground marathon. Scheduled for November 30, 2024, this unique event will feature a course that includes several tunnels, some requiring participants to stoop due to height restrictions. The UCAP Bunker, located 100 feet underground, has historical significance as a former Royal Navy headquarters during D-Day. Participants are required to wear headtorches and cycle helmets for safety. The event is organized under ARC Running Club rules, and no refunds or transfers are permitted for entries. Visit the organization's website for the most recent information.

Race information

26 mi
Marathon
Visit the organization's website for the most recent information.
Trail runs nearby

Single-loop winter trail races from Queen Elizabeth Country Park offering 50 miles (listed as 53 miles), 50K and 20 miles across the South Downs. The 50 mile event has about 6400 ft ascent and is a UTMB Index race worth 3 ITRA points.

UTMB Index

Trail running at Amberley Museum in West Sussex with three waymarked routes on the South Downs Way. Distances range from 6 km to 22 km, with on course outposts, a reusable cup policy and free parking.

Two coastal half marathons in Portsmouth and Langstone Harbour on 7 and 8 February 2026. One course may use an optional ferry from Hayling Island, the other runs by the D Day Story Museum in Southsea, and completing both earns a bonus medal..

Single lap trail races in the Meon Valley from Queen Elizabeth Country Park offering 16 mile, marathon and 50km options with marked routes, aid stations and mandatory fluid carriage.