It's Grim Up North Running Swinsty & Fewston Lakeside Dash
The 6.7-mile loop of Swinsty and Fewston reservoirs on well-kept trail, run once, twice, three or four times for the half, the twenty and the marathon. Everything starts at nine.
| Distance | Ascent | Per km |
|---|---|---|
| 42.2 km Marathon | — | — |
| 20 Mile | — | — |
| 21.1 km Half Marathon | — | — |
| 6.7 Mile | — | — |
Nobody has reviewed this one yet
No reviews of the Swinsty & Fewston Lakeside Dash, and nothing on what people wore. Both are things no organiser publishes and every runner wants before they enter — how it actually went, and what was on your feet.
Ran it? Write the first reviewRunning it soon? Connect Strava and we will ask you about it the day you finish, so you do not have to remember to come back.
Pick your distance
What you’re in for
The November race on the reservoir loop: once for the 6.7 Mile, twice for the half, three times for the twenty, four for the marathon, everything starting at nine. The course is the 6.7-mile loop of Swinsty and Fewston reservoirs in the Washburn Valley above Otley, a figure of eight on the well-kept perimeter paths, with the shorter events using the 3.3-mile Swinsty half of it. Pay-and-display parking at the North Lane car park next to registration. You run the loop once, twice, three or four times for the half, the twenty and the marathon.
Terrain and trail
Well-made gravel and tarmac reservoir paths with short woodland sections, tree roots, a footbridge or two and a couple of gentle rises — undulating rather than hilly. Fast, dry ground most of the year and the prettiest Grim venue in autumn. Wet leaves over roots are the thing to watch in November. Feed stations roughly every three miles with drinks, sweets and cake, and the events are cup-less, so bring your own cup or bottle. A GPX is supplied and not every junction has a marshal, so know where the turn is. Over-ear headphones are not allowed, and some road crossings are unmarshalled.
Partner · affiliate policy
Train for it: routes near the start
Routes starting within 20 km of Swinsty & Fewston Reservoir car park, North Lane, near Otley, nearest first. Each one has a free GPX file and a TRP grade, so you can rehearse the ground before race day.
EASY
HARD
MODERATE
MODERATE
EASY
EASYHow to enter
Sat, 7 Nov 2026 · Entries open · £29–£43
Enter on their website ↗Entries are handled by It's Grim Up North Running, not by us. We take nothing for sending you there.
Add to your calendar · with the start time
Common questions
- The Swinsty & Fewston Lakeside Dash offers 4 distances: 6.7 Mile (10.8 km), Half Marathon (21.1 km / 13.1 miles), 20 Mile (32.2 km), Marathon (42.2 km / 26.2 miles).