Harold climbed regularly in the late 1940s and 1950s with most of the leading northern rock climbers of the day including
Joe Brown and members of the famous
Rock and Ice Club. Another regular partner throughout his active career was his brother, Neville Drasdo, who became a formidable climber during this period in his own right and whose activities included an ascent with Joe Brown of one of the hardest British routes of its day, "Hardd" (now
graded E2 5c) on
Carreg Hyll Drem in
Snowdonia. Harold and Neville Drasdo were the first climbers to explore
Poisoned Glen in
Donegal,
Ireland, and during an intensive period established several hard first ascents. In 2000, the Drasdo brothers celebrated 50 years of new routing, a half-century that began with "Cravat" (graded VS 4c) on
Neckband Crag,
Langdale, in 1950 and culminated with "Two Against Nature" (graded S 4a) on
Craig Ddu,
Moel Siabod. ==Climbing author==