Today Henry, Rich and I climbed headed up into the North Face of Ben Nevis and climbed Observatory Ridge (IV,4). Cracking day today, couldn't believe how quiet(ish) the mountain was. 1 team on tower, 1 on Ledge, 1 on castle, 1 on point 5 and 1 on Darth Vader (or was it some black rock below it?). The ridges were under quite a bit of snow and made some of the route quite hard work, gear was hard to find sometimes. We did the whole route in 10 pitches.