Brighton to London 100k Ultramarathon

About this event

This 100k ultramarathon traces a historic route from Brighton's seafront to the Thames in London, threading together some of southern England's finest paths. Starting near the iconic pier, runners follow the South Downs Way's rolling chalk ridges before dipping into woodland sections along the Sussex Border Path and London Loop. The route crosses Ardingly Reservoir and gradually transitions from open countryside to London's greener outskirts, finishing riverside at Kingston. With fully stocked checkpoints and GPS tracking throughout, it's a proper challenge for experienced ultrarunners looking to test themselves on a mix of terrain that shifts from technical trails to quieter roads as the city approaches.

Distances