Mostly sea-cliff climbing and mostly quartzite with a few very minor outlying shale outcrops and quarries. The main cliffs and Castell Helen are multipitch, tidal and serious of access and egress. The routes are awesome. Do them you must, with respect due for seasonal restrictions, nesting birds and the seriousness of the situations. If conditions are not suitable for the main cliff there are some very pleasant climbs on Holyhead Mountain. Some lovely little gems can be found further afield at, for instance, Rhoscolyn and Smurf Zawn.
A few lessons learnt. Assumed we were on the line of El Dorado but, without a guidebook had actually found ourselves on the wrong wall and subsequently wrong climb! Topped out after breaking the climb down into two pitches, with a belay at the ledge at the start of the cracks. Seagulls also nesting on route which proved difficult to negotiate!
