100 mijl, 100 km en 50 km: HoHo 100 Marco Groot Memorial

Information edition 2025
On Saturday 1st of February the third edition of this ultra event will take place in the city of Amersfoort. Amersfoort is situated in the middle of the Netherlands.What, when, where, who?

What: 100 Miles & 100 Kilometers & ½ 100 Kilometers (= 50 Kilometers)

When 100 Miles: The start is on Saturday 1st of February 2025 at 8:30 AM for the 100 Miles . You can finish until Sunday 2nd of January 2025 6:30 AM. So, the maximum time to complete the 100 Miles is 22 hours.

When 100 Kilometers: The start is on Saturday 1st of February 2025 at 10:30 AM for the 100 Kilometers . You can finish until Sunday 2nd of February 2025 6:30 AM. So, the maximum time to complete the 100 Kilometers is 20 hours.

When 1/2 100 Kilometers (=50 Kilometers): The start is on Saturday 1st of February 2025 at 14:30 AM for the ½ 100 Kilometers . You can finish until Sunday 2nd of February 2025 6:30 AM. So, the maximum time to complete the 100 Kilometers is 16 hours.

Where: Altis, Schothorsterlaan 78, 3822 NB Amersfoort, the Netherlands.

Maximum number of participants: 50 for each distance

Contact: info@run033.nl

Race Director: Mark van Hoorn

Course
The course is officially measured by the Dutch Athletics Federation.

The start-up round of the 100 Miles has a length of 1,670.65 meters. After the start-up round you have to accomplish 43 full rounds of 3,703.81 meters.

The start is of the 100 Kilometers is at the finish line. You have to accomplish 27 full rounds of 3,703.81 meters. Then the total distance will be 100.00287 kilometers. So, the course will be 2.87 meters too long.

The start-up round of the ½ 100 Kilometers (=50 Kilometers) has a length of 1,850.47 meters. After the start-up round you have to accomplish 13 full rounds of 3,703.81 meters.

The course has no mentionable altitude meters. The course is not traffic-free. Mainly bikes and scooters will be on the course and sometimes a lost car. The underground is mixed: tartan track, asphalt and small cobblestones.

Click on the map to go to afstandmeten.nl to see the course in more detail. The start of the 100 Miles is at the “A” on the map. The finish is at the F, which is also the start of the 100 Kilometers. The start-up round of the ½ 100 Kilometers (=50 Kilometers) is at the ‘B” on the map.

Spartathlon qualifier
The HoHo-100 can be used as a qualification for the Spartathlon. The subscription period for the Spartathlon mostly ends at the end of February. The Spartathlon website has not been yet updated for the edition of 2024. For the edition of 2023 the qualifying times were:

Finish a 100-mile race in 21:00 hours (men) or 22:00 hours (women).
Runners having achieved a performance at least 25% better than the ones required in section 2, are considered qualified and are thus automatically admitted. Adjustment by HoHo-100: This means for the 100 Miles 15:45 hours (men) or 16:30 hours (women).
There should be 5 finishers at least
Participation fees

Early Bird Regular Late Bird
till November, 10 from November, 11 till January, 12 from January, 13 till January, 31
100 Miles € 50 € 60 € 70
100 Kilometers € 45 € 55 € 65
½ 100 Kilometers (= 50 Kilometers) € 40 € 50 € 60
What is included in the participation fee?
Officially measured course
Electronic timing (including lap times)
Toilets, dressing rooms and showers
A sports canteen where your supporter(s), if you have any, can shelter warmly
A sports canteen where your supporter can warmup some food for you
A spot around start/finish where you can put your own food and drinks
The organisation provides also some food:
Bread between 12:00 and 14:00hours
Soup with meat or vegetarian (starting around 18:00 hours and the continually to the end of the race
Pasta with meat or vegetarian, between 18:00 and 20:00 hours
Tea and Coffee
Water, Coca Cola, bars, bananas also available
No Sports drinks, because we see at other ultra events that ultra runners mainly use their own sports drinks
Basic Medical Support