Mark – We'd planned the shorter loop going across McCurdy Park and back around via Refrigerator Gulch – I've seen it described as 22 miles and 26 miles.
A number of factors slowed us down. Having both flown in from NJ and MI respectively on Thursday afternoon, we'd planned to leave Boulder at 6am for an 8.30am start from the TH. Car trouble (a dead alternator) screwed up those plans, and we finally hit the trail at 1pm, giving us about 3 1/2 hours daylight hiking on the Friday.
Secondly, the blowdown section of the Hankins Pass Trail required a lot of creek crossings which took time to negotiate with snow and ice. And we took it slow on the first day to help with acclimatization to altitude.
On Saturday we made a mistake and passed the last decent water access just below Hankins Pass without refilling. We opted for the Lake Park Trail at Hankins Pass rather than descending 650ft to Bison-McCurdy and climb another 1700ft. There were no suitable water sources on Lake Park. Stopping to melt snow would have put us further behind schedule.
Stephen had an 8am flight out of Denver on Monday, and completing the loop by sunset on Sunday would have been type 2 fun. Next time we'll be equipped with the knowledge from this trip, and I'm sure we'll do better. It's all good experience, and we had a good time.