Restricted Access

Officially there is no access permitted away from the PROW or bridleways. 

Access to climb Trango Towers/Peppermint Pig areas is sensitive as it lies within the inner perimeter of the power station - climbers are occassionally asked to leave this area by security staff. Access to Rainbow slabs and surrounding areas is only possible from the Llanberis side but access from Nant Peris (Pass side) is striclty not allowed.

This area includes all of the lower part of Dinorwig Slate quarry, including Rainbow slab area, and the levels opposite (Rainbow Walls). The Lower Dinorwic quarries are all on land owned by  First Hydro Company (FHC). FHC have to comply with the Mines and Quarries Act. This means providing a properly maintained barrier to prevent members of the public from falling into the quarries. The company are repairing fencing in the area and employing additional signage to emphasise the dangerous nature of the quarries. There is no formal permission to climb or walk in the quarries away from the public footpaths and if the secutiry staff carrying out routine patrols,  see any members of the public (including climbers) away from the public rights of way they will be asked to leave. Please follow their instructions and do not create conflict if this is the case.  Please respect the environment of the quarries, do not damage any fences, keep dogs under control and take all litter home with you. In order to protect the current sensitive access, climbers have agreed not to climb on any of the levels below the Rainbow level or on the large tower overlooking the power station buildings.

Seasonal Restrictions

Dates: 1 April to 30 June

Reason: Nesting Birds

Rainbow Slab Area - Nesting Birds

Peregrines are nesting in the area betwen Colossus Wall and the Main Rainbow Slab area. These are legally protected birds and it's a criminal offence to intentionally or recklessely disturb these  birds at at time. 

A new seasonal restriction applies to all the routes between and including "OM 69 Runner Bean" and "Naked Before the Beast" - this includes the popular  routes "Red and Yellow and pink, etc." and "Pull My Daisy".

Also when walking past to the main Rainbow Slab Area, please do not loiter or hang around beneath these routes. 

The extent of this restriction will be reviewed in late April/early May and may need to be extended. 


Rockfax Description
The immaculate corner has a hard start to get to a ledge on the right at about 5m. The route eases above. © Rockfax

UKC Logbook Description
Climb the corner - well protected by wires.

M E Crook, N Walton 18/Aug/1984.


Victim Of Mathematics' Ticklist of Extreme Justice , Dinorwig Essentials , North Wales Rock Graded List , Welsh climbs to last a lifetime , UK Extreme Corners , Ultimate E2 ticklist , Bangor BUMS Uni-Life Ticklist , AMC Uni Ticklist , Welsh Slate Trad , Bridging Corners, Grooves, Diedres in the UK , UK Holiday Plans , George's Ultimate Easy to Mid-Grade North Wales Trad Ticklist , Slate Mastery , Hard Rock & Other Classics , Llanberis Slate *** Routes , Wales Trip - 2022 , Slate Goals , Recommended Slate


User Date Notes
R_Jo89 14 Jun, 2023 Show βeta
βeta: Slipped off the first foot hold. Still claiming the onsight
Show beta
βeta: Slipped off the first foot hold. Still claiming the onsight

Logged Ascents

998 users have logged this

Guidebooks for Rainbow Slab Area

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High E3
Mid E3
Low E3
High E2
Mid E2
Low E2
High E1
Mid E1
Low E1
Votes cast 152
High 6a
Mid 6a
Low 6a
High 5c
Mid 5c
Low 5c
High 5b
Mid 5b
Low 5b
Votes cast 145
Votes cast 132
Style of Ascent
Alt Leads
Not Set
Flashed (β)
Ground Up
Not Set
Route of Interest
Pull My Daisy

Grade: E2 5c ***
(Rainbow Slab Area)

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