On the eastern side of Mt Pleasant just south of the summit ridge, and just west of the old World War II concrete gun emplacements. The crag faces west, and runs south from the zig-zags in the track up to the gun emplacements.
There's good shelter from the north-east, and it's nice and sunny on a winter afternoon. It can be hot in summer. It's exposed to the south, but there's a degree of shelter in a north-wester, though others would be preferred.
There are 24 climbs ranging from 14 to 22, concentrated in grades 20-21, and most of these are excellent climbs. Most routes are well protected, many with bolts, but three of the oldest routes, on the right end of the cliff, are awaiting re-bolting and the bolts may not be safe.
The rock is the coarse-grained Mt Pleasant trachyte, which gives excellent friction. As with all the Mt Pleasant cliffs, beware of loose flakes, especially as many climbs have had only a few ascents.
The initial climbing by Brian Fish and Joe Arts in 1981 of five routes on the south-facing right hand end was an odd quirk in the development of Christchurch climbing. At Lyttelton Rock, Scratching Julius, which was the catalyst for development of the crag, had not yet been done. To reach Crag X more accessible crags were bypassed, and the largest part of the crag was ignored. Little wonder that the crag was mostly left alone for a decade, until Joe Arts started a second phase of development in 1991-92, of which the notable route was the crag's showpiece, Gripping Scales.
Finally, in October 1997 Lindsay Main and Joe Arts set some kind of a record by doing eight new routes during one hot spring day to clean up most of the obvious remaining lines.
Access: Approaches The simplest approach is from the Summit Road at the Major Hornbrook Track, as for Lyttelton Rock, and walking along the bluffs track. However this is quite long. One alternative is to park at the end of Broadleaf Lane as for the Three Sisters and walk along the ridge eastward; another is to park on the Summit Road about 100 metres west of the macrocarpa trees and walk south across Richmond Hill Farm to the ridge crest and then drop down. Restrictions No access across Richmond Hill Farm during lambing (the month of August). Use the bluffs track from Lyttelton Rock or the Middle Sister. Otherwise there is access across the farm without permission.