The Grim Reaper - 10, 40, 70, 100 Miler
Sat, May 23, 2026
Grimsthorpe Castle Park & Gardens, Grimsthorpe
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The Grim Reaper - 10, 40, 70, 100 Miler
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Booked 5 times in the last week
Booked 5 times in the last week
About
Take in the picturesque views of the Grimsthorpe Castle and estate as you explore everything the course has to offer, from ancient woodlands to disused Victorian railways as well as its amazing lake. Either take on the Ultra or spice things up with the 10 mile night race. Come for a great adventure.
100 Miler, 70 Miler, 40 Miler, and 2 more
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Sat, May 23, 2026
View logistics
Grimsthorpe, United Kingdom
View location
4.9(Reviews)
All reviews
Where and when
Location
Grimsthorpe Castle Park & Gardens, Estate Office, Grimsthorpe, Bourne PE10 0LY, UK
Start times
Saturday, May 23, 2026
100 Miler: 7:00 AM70 Miler: 7:00 AM40 Miler: 8:00 AM10 Miler - Day: 10:00 AM10 Miler - Night: 9:00 PM
Event summary
Here are the distances available for The Grim Reaper - 10, 40, 70, 100 Miler
100 Miler
100mi
£60 - £160
70 Miler
70mi
£140
40 Miler
40mi
£90
10 Miler - Day
10mi
£35
100 Miler
100mi
£60 - £160
70 Miler
70mi
£140
40 Miler
40mi
£90
10 Miler - Day
10mi
£35
Route information
Take on this 10 mile loop around picturesque grass trails throughout ancient woodlands, limestone tracks, and quiet roads. The fully-marked course is undulating throughout, this is ideal for all looking to step up to a longer distance.
What's included
- Finisher's Medal
- Can of ERDINGER alkoholfrei lager
- Trophies for 1st/2nd/3rd male and female in all solo races
- Trophies for winning team members
- Aid Station - mile 5
- Medics
- Food and Drinks (extra cost)
- Fully-marked course
- Free camping
How to get there
Grimsthorpe Castle Park & Gardens, Estate Office, Grimsthorpe, Bourne PE10 0LY, UK
Get full directionsCamping
Runners are permitted to camp on-site from Friday to Saturday. The camp will be close to the start/finish line.
By Train
The closest train station to Grimsthorpe Castle Park & Gardens is Stamford (Lincs), from there you can take the bus to Grimsthrope Castle.
By Car
Grimsthorpe Castle is located just off of the A1 just past Corby Glen towards Bourne.
Hotels and Accommodation
bog dog has partnered with Let's Do This to bring you some of the best hotel rates close to the startline.
Find your roomEvent day logistics
Saturday
07:00am: 100 and 70 Miler (solo & team) starts. 28 hours time limit.
08:00am: 40 Miler (solo and team) starts. 27 hours time limit.
10:00am: 10 Miler day starts
21:00pm: 10 Miler night starts
Sunday
11:00am (Sunday): 100, 70 & 40 Miler races cut-off time
Race Rules
- Runners must follow the marked course at all times
- Your bib number must be worn on your front at all times
- Runners must not stash food/supplies on the course
- If you are caught littering you will be disqualified
- Runners are responsible for the actions of their pacers
- Pacers are permitted only for the 50 mile course and must be on foot
- Runners are only allowed one pacer at one time
- Runners must carry mandatory equipment with them at all times
- Runners are not permitted to run with dogs. You may walk and start at the back of the
- You must comply with all instructions given at the race briefing
- If you are unable to finish the race you must inform the race directors
- Walking poles are allowed
Team Entry
There is the option to enter the 40 and 100 mile distances as a team, where runners can take part relay style with friends. For the 40 miler teams can have a maximum of 4 per team, and for the 100 miler teams can have a maximum of 5 people. This is the perfect way to get into longer distances, and you get to take part with friends.
Withdrawals
If you need to withdraw for any reason, unfortunately, the event organiser is unable to offer a refund. However, you can defer your place to 2027 up to 4-weeks prior to the race. Should the 2027 event not go ahead, due to unforeseen circumstances, your deferral is void and no refunds will be given.
If you would like to transfer your place to another runner, please email hello@bogdogrunning.co.uk with the runner's name, address, date of birth, gender and any medical information. Transfers after May 3 will incur a £5 admin fee.
FAQs
Is there a cut-off for Grim Reaper 10, 40, 70, 100 Miler?
For the 40, 70 and 100 mile races there will be a strict cut-off time of 26 hours.
Will there be medics on the course at the Grim Reaper 10, 40, 70, 100 Miler?
Yes, there will be fully qualified medics onsite throughout the event.
Will there be food and drinks at the Grim Reaper 10, 40, 70, 100 Miler?
Yes, there will be hot food and hot/cold drinks available to purchase throughout the event (from 6am on Saturday until 10am on Sunday).
Reviews
4.9
100 reviews
Smiths Building, Lower Ground Floor, 179 Great Portland St,
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