North Wall is in Ao Nang town, under five minutes' walk away. All titanium bolts (Hilti 500 glue), 103 routes from 4b+ to 9a, a 50 THB all-day entry fee, gear rental, toilets, and it climbs from September to March. theCrag carries two warnings: you must park outside in a designated spot and not by the pond at the main entrance, and there are thieves targeting climbing gear, phones and cash. Private land, and drilling or chipping the rock is forbidden.
Chong Phli, also called Spirit Mountain, sits on the Krabi mainland between Ao Nang and town, with 157 routes logged on theCrag from 4b+ to 9a across ten sectors. About 90% of the bolts are titanium with RE-500 glue, some routes use slings because the rock is soft, and every anchor and sling is checked once a year. There is a homestay and community centre at the crag with bungalows, water and toilets — the closest thing to a resort base on the mainland.
Railay East sits on the west side of the Phra-Nang peninsula; theCrag logs 314 routes for the whole of Railay, with Muay Thai, the 123 Wall, The Keep, Hidden World and Diamond Cave on this side. From 9am to 4pm is climbing school territory and it is very crowded — theCrag literally says do not come between those hours if you dislike crowds. Many routes run on old expansion bolts, and the three old routes on the left of the 123 Wall plus the four extensions above Kratoy are all marked do-not-climb.
The west side of Railay holds Southeast Asia's most famous multipitch: Lord of the Thais (7b, 5 pitches, 120 m), Continental Drifters (7c+, 4 pitches) and Circus Oz (7a, 4 pitches), plus Crystal Flame (6b+, 3 pitches, 70 m). But the descent notes are where the risk lives — two routes say do not climb, and the abseils need two 60-metre ropes, extra rope at the rappel station, or a knot in the end.
Tonsai is the island on the east side of the Phra-Nang peninsula, with 448 routes logged on theCrag from 4a to 9a and two thirds of them on the beach side. The rock is limestone with jugs, stalactites, tufas and cave roofs. Bolt condition is the big trap: one route can be all titanium while the one three metres away has rusty expansion bolts and says Do not climb. There is no road access — you rely on longtail boats that only run in daylight.
Thailand's crags split three ways: Krabi's islands and mainland are the busiest, Chiang Mai to Chiang Dao hold northern limestone, and the central valleys come with temple and camp rules. December to February is driest in Krabi. Crazy Horse still has no official reopening notice, Lampang sits on military land, and Koh Yao Noi is officially off limits. Pick a region first, then deal with bolts and transport.