The Diamond
Climbing
Regulations on 30 October 2026
Signs at the site and later resolutions prevail; check the source.
The position marks the site rather than the extent of the rule.
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Voluntary closure
Climbing · 1 Mar to 31 Jul
Not in force on 30 October 2026
Restrictions apply from 1 March - 31 July.
Reason: Nesting Birds
The whole crag is restricted during the nesting period. Arrangements are in place for the crag to be monitored and if the birds fledge the restrictions will be reviewed. This restriction is usually longer than most due to the presence of nesting Kittiwakes (which have a later nesting season) as well as colonies of Guillemots and other sea birds.
Historically, this is one of the most important refuges for this species in North Wales, with over 150 Kittiwakes on the crag, and as species that is in serious decline, it's an internationally important conservation site. Although it may appear that last in the nesting season that the the young are flying about, it's an important stage in their development with the parents "training" the young how to feed. Disturbance to the colony at this stage can lead to greater losses during the winter.
Published by BMC, 28 Jul 2026 · The Diamond