LDWA Thames Valley Marlow Donkey
A new Chilterns route each year from Marlow, centred on the Hambleden and Stonor valleys: 25k, 40k or a fiftieth-anniversary 50k. Limited to 150 and usually full by early September.
| Distance | Ascent | Per km |
|---|---|---|
| 50K | — | — |
| 40K | — | — |
| 25K | — | — |
Nobody has reviewed this one yet
No reviews of the Marlow Donkey, 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
11h cut-off, which needs 13:12/km
What you’re in for
A new Chilterns route each year from Marlow, centred on the Hambleden and Stonor valleys: 25k, 40k, or a fiftieth-anniversary 50k. Eight hours for the 25k and eleven for the longer two, all back by seven. Limited to 150 and usually full by early September. An LDWA challenge event, which means walkers and runners together, a route description to navigate by rather than tape, checkpoints with food and drink, and a meal at the end. Entry is through the LDWA's own system, places are limited, and the ones in this list tend to fill early.
Terrain and trail
Chalk bridleway, beech-wood single-track and the steep sides of the Chiltern dry valleys — firm in October, greasy under leaves after rain. A trail shoe.
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Make your race print →Cut-offs
8 hours for the 25k, 11 hours for the 40k and 50k. All to finish by 19:00.
Other races near here
Chilterns races →Races from other organisers starting within 30 km of Liston Hall, Marlow, Buckinghamshire, nearest first.
31
May
2027
Rebellion 10km
Marlow Rugby Club, Riverwoods, Marlow · Racing Line Running · 1 miles away
Bank holiday trail 10km by the Thames from Marlow Rugby Club
Not open yet
£31–£33
22
May
2027
Beat the Sunset 50km
Summerleaze Park, Maidenhead · Racing Line Running · 4 miles away
Flat noon-start 50km from Maidenhead: finish before the 8:57pm sunset
VERY HARD
Not open yet
£68–£70
7
Aug
2027
MTC Windsor Ultra
The Catherine Wheel, 7-15 Hart St, Henley-on-Thames, RG9 2AR · Ultra Running Ltd · 6 miles away
47 miles of Thames Path from Henley past Windsor and Runnymede to Kingston
Not open yet
£90
7
Nov
2026
The Maverick Dark Oxfordshire Trail
Henley-on-Thames, Oxfordshire · Maverick Race · 7 miles away
Stonor Park by head torch.
MODERATE TO HARD
Entries open
How to enter
No date announced for the next running yet. LDWA Thames Valley’s site ↗ is where it will show up first.
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Common questions
- The Marlow Donkey offers 3 distances: 50K (31.1 miles), 40K (24.9 miles), 25K (15.5 miles).