Thames Path Challenge

A 100 km walking, jogging and running challenge organized by Action Challenge (Ultra Challenge) each September. The full route follows the Thames towpath upstream from southwest London toward Henley-on-Thames, with shorter 25, 50 and 75 km options, a two-day version and a 100 mile option. Rest stops are spaced roughly every 12.5 km and the route is marked for walking through the night.

Text from OyList