Good on a hot day. The Three Sisters is a group of cliffs on the south side of Mt Pleasant, about 100m below the radio masts on the summit and (mainly) just below the Crater Rim Walkway. Away from the maddening crowds the whole area overlooks the port of Lyttelton and the climbs have a very picturesque setting among cliffs and native bush.
There are some good short routes which are usually soloed on the Baby Brother. The cliffs are well sheltered from winds from a north west to north east quarter, except the Baby Brother, which is exposed to the west.
The Baby Brother is on the ridge west of the West Sister, and faces south and west.
Twisted Sister is a steep south-facing trachyte cliff, similar to the Middle Sister, though with less afternoon sun. The rock has amazing friction, though there are a few crumbly bits, especially in areas of light traffic. There are about 20 climbs ranging in grade from 17 to 26. Chains are being installed at the top of most routes.
The crag with the most routes, the middle sister is directly below the antenna farm. The track passes directly across the top, to get to the base either follow the steep track on either side, or abseil in down judge and jury.
Ugly Sister has had arange of sport routes added in the early 2000s mainly by Tony Burnell
As for Lyttleton Rock. Access is from the Summit Road where the Major Hornbrook Track crosses on its way down to Lyttelton, between the top of Mt Pleasant and the Mt Cavendish. From the gate the first small buttress to the East, (Suzie's Slab) is visible. From there an obvious track leads over to and around under Lyttleton Rock eastbound, towards the gun implacements.
The promantory south of the track where at the top of a small climb is the Baby Brother.
On top of the Baby Brother you are able to view eastwards and see parts of Twisted & Middle Sisters.
The track goes downhill, (west-east) below the track are Twisted, Middle & Ugly Sisters.
Above the track are Trackside, Crag V & Crag W. As you climb back up to the gun implacements the crag on the right is Crag X