★★ Sunstroke 9

An easy, well-protected popular classic. Climbed on a searing summer's day, it was the first climb done on 'The Northern Slabs', taking the line of least resistance. Start at a slanting crack eight metres left of 'Equilibrium'.

1. 40m - Rightwards up the crack, then follow the groove leftwards to a sloping ledge. Belay at some wedged blocks.

2. 20m - Doddle leftwards up the groove to a belay in the corner.

3. 25m - Bridge and layback up the short corner, then left and up the steepening groove. Continue to a ledge and belay on the right.

4. 35m - Up the twin grooves to a large terrace covered with loose rock.

This is often run together into two pitches (1/2, 3/4) rather than four. If you love slabs it's also possible to combine P2 and P3 by slabbing up as for Ephemeros, avoiding the short corner on P3.

The ethic at Booroomba is generally staunchly traditional. Most climbing goes either entirely on gear or gear with bolts for those walls where there is insufficient gear to protect climbs. Climbs are occasionally rebolted, but retro-bolting would be considered vandalism of the lowest order.