100 Marathon Club AGM Challenge

SEP
19
2026
Timed six hour lapped event at Park House School with 3.4 mile laps, chip timing, varied aid table and bespoke finisher medals.
Sat 19 Sep 2026
31 miles 27 miles 26 miles 14 miles 3 miles

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100 Marathon Club AGM Challenge

Run Forest Run is hosting a timed lapped event in association with the 100 Marathon Club of Great Britain and Northern Ireland. The course uses a single lap of approximately 3.4 Miles and the event is open to all runners, including non-club members.

The format is a six hour timed event. Completing one lap counts as a finisher. Runners may complete as many laps as they can within the six hour limit.

  • 4 laps for a half marathon
  • 8 laps for a marathon
  • 9 or more laps for an ultra-marathon

The course sits in the Berkshire countryside near Park House School and is a mix of trails and pavement, including a long pavement section along Monks Lane back to the school.

Chip timing will be used and chips are collected on the day with the race number. All finishers receive a bespoke medal featuring the club logo. An aid table and drinks table are available at the start/finish of each lap with savoury, sweet, fruit, gluten free and vegan options. The event is cupless.

Toilets and changing facilities are available at race headquarters. A bag drop is provided next to the start/finish but is unmanned and left at participants own risk. Free parking is available at the venue. Under 20s may not run more than eight laps. Club members entering specified races before 31/07/2026 are offered a refundable £5 discount. Visit the organization's website for the most recent information.

31 mi
Ultra-Marathon (9+ Laps)
27 mi
Marathon (8 Laps)
26 mi
Handicap Marathon
14 mi
Half Marathon (4 Laps)
3 mi
1 Lap
6 Hour Timed Run
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