Change:  a vague grassy gully with a faint path which arrives directly at the quarry car park.Escapable in several places by short scrabbling,scrambling, then steep grass slopes to gain the North Stack path.   View changes from previous version. (Word count: 1244)

Change: and grassy slopes between Penlas Rock and Penlas Gully. Excellent and sustained climbingclimbing, often on amazing rock, continues under Yellow WallsWall to Mousetrap Zawn, with at least one swim after Lighthouse Arete.Egress: From the far side of MosetrapMousetrap Zawn, reverse the approach   View changes from previous version. (Word count: 1243)

Change: Tidal issues: very exposed at North Stack in adverse weather and tidal conditions. The north facing coast line can also be very exposed in adverse conditions.Access : From North Stack 1. abseil in to Parliament House Cave, and use the   View changes from previous version. (Word count: 1137)

Change: In 1980 Scottish climber John Cunningham died on a low level traverse at South Stack after being swept out to sea while trying to rescue someone. Traditionally done with a rope for the Tyroleans, the traverses are now more commonly soloed, with short swims across unclimbable sections. Confident swimming   View changes from previous version. (Word count: 1002)

Change: sea while trying to rescue someone. Traditionally done with a rope for Tyroleans, the traverses are now more commonly soled with short swims across unclimbable sections. A wetsuit   View changes from previous version. (Word count: 864)

Change: Traditionally done with a rope for Tyroleans, the traverses are now more commonly soled with short swims across unclimbable sections. A wetsuit is strongly recommended   View changes from previous version. (Word count: 851)

Change: Three to five short swims are normal. Access : follow the Main Cliff descent path below the Upper Tier. Follow the traverseTraverse below the Main Cliff to a compulsory 6a/b section, or a short swim,   View changes from previous version. (Word count: 635)

Change: mainMain cliffCliff traverse, with which it is ideally combined to make a fascinating day trip.Access : 1. abseil in to Parliament House Cave, and use the through tunnel to gain the north side of North Stack. 2. easy scrambing down the north   View changes from previous version. (Word count: 532)

Change: In adverse weather the seaward end of the tunnel can be 'interesting'. Scramble up on to North Stack. North Stack to Holyhead Harbour A cool, isolated and often sunless proposition, taking in some esoteric little zawns   View changes from previous version. (Word count: 429)

Change: traverse or swim). North Stack beckons. When you get there, head for the top left hand corner of Parliament House Cave. You will discover an amazing tunnel that leads through the headland. Scramble up on to North Stack. North Stack to Holyhead Harbour A cool, isolated   View changes from previous version. (Word count: 407)