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Grim Reaper Ultra Marathon
UltraUnited KingdomEngland

Grim Reaper Ultra Marathon2027

22.05 – 23.05.2027Grimsthorpe Castle (United Kingdom)
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Pacing, fueling and crew sheet for the course you pick

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3 courses · 65–161 km · up to 1’650 m D+

3 courses

  1. 65km

    660 m D+

    avg 1%

    Grim Reaper 40-miles

    29.05.

    UTMB Index 50K

  2. 113km

    1’169 m D+

    avg 1%

    Grim Reaper 70-miles

    29.05.

    UTMB Index 100K

  3. 161km

    1’650 m D+

    avg 1%

    Grim Reaper 100-miles

    29.05.

    UTMB Index 100M

GPX trace not yet published.

Race plan

Plan your race from start to finish.

Pacing, aid stations and fueling timed to your effort on Grim Reaper Ultra Marathon, in one roadbook.

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The race

Four solo distances, a 100-mile relay and a night 10 on a stunning castle estate in South Lincolnshire.

Where to stay

Find a place to stay near Grimsthorpe Castle for the race.

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