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Blackstairs Crossing

This is a point to point challenge in which the runner hits the 7 summits of Dublin's arderins. The runner chooses their route between each summit. Runners can either start at Kilmashogue Forest gate and end at Seahan Forest gate or visa versa. Separate records will be kept for each direction.

The challenge begins when the runner leaves their chosen start gate and it finishes when the runner arrives at their finish gate. The Dublin Mountain summits of Fairy Castle, Prince William's Seat, Knocknagun, Glendoo, Kippure, Seefingan and Seahan must be visited along with the forest gates at the beginning and end of the challenge. There is no time limit on this challenge. Maggie Lawler created this challenge and was the first to attempt and finish it on November 27, 2021.  

The Check points

Grid Reference
Seehan Barrier Gate
O 074 201
O 081 197
O 086 169
O 115 154
O 141 205
O 163 185
Prince William seat
O 176 182
Two Rock
O 172 223
Kilmashogue Barrier Gate
O 151 245

*Please see gallery below for photos of checkpoints. 

Further rules and guidelines:

  • Athletes must carry coat, hat, gloves, foil blanket, first aid kit, whistle, map/compass and/or gps for the duration of the challenge.

  • Runners must announce their attempt to IMC, prior to their run. 


  • GPS devices are allowed and pacers are allowed. The same pacer(s) can not complete the length of the challenge with the runner. Otherwise, it will be considered a team completion. 

  • If a runner chooses to attempt their challenge unsupported and/or solely with map and compass navigation, then this will be specified on the results page. 

  • Completed challenges will be validated when a runner/s supply IMC with a gpx of their run. If a runner chooses to navigate solely via map/compass, and they would like this to be specified in their results, then they will have to supply gps tracking link from their run. 


This is a personal challenge. IMC's only involvement is to agree to record attempts. Neither IMC, its servants or agents can accept any responsibility of any nature or kind for loss, damage or injury suffered by a participant who takes part or attempts Dublin 7 Summits. Each participant takes part at their own risk and is fully responsible for their own safety, support and equipment.

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