A 302.4km ultra-distance road loop around London from Westminster, with 2,963m of climbing.
- Distance
- 302.4 km
- Elevation
- 2,963 m
- Terrain
- Challenging Endurance
- Type
- Road loop
Start and finish: Near Westminster, London
About this route
This route was not designed by London Dynamo. It comes from the London Ultra route files we hold, and we have not confirmed the organiser or whether the event is still run.
On the route
London Ultra 300 is a longer ultra-distance ride in a big circle around London, starting and finishing in Westminster.
This is a provisional route. We will revisit this page from time to time to swap in a confirmed route once we have one.
The route measures 302.4km with 2,963m of climbing, which gives it a Terrain label of Challenging. Its notable climbs are listed below.
This page is for riding the route on your own or with friends. There are no organised feed stops, so plan your food and water for the day.
Event names and logos belong to their owners and are shown for identification only. London Dynamo is not affiliated with these events.
Notable climbs
- Combe Lane: 1.4km at 7.9% average.
- Climb near 192km: 3.5km at 4.1% average.
- Steep ramps: 125m at 13.2% average (c. 18km), 300m at 10.9% average (c. 222km), 150m at 12.4% average (c. 226km), 150m at 17.4% average (c. 266km), and 125m at 15.9% average (c. 272km).
Strava Verified Segment: length and average gradient come from the segment.
Route map and GPX
To download the GPX or TCX file, open the route on Strava with View on Strava below the map, choose the three dots menu, then Export GPX or Export TCX. A free Strava account is needed. Route checked against Strava on 27 October 2026.