Big Thompson Canyon (US-34) is a moderate climb. It is a spectacular canyon with awe inspiring granite walls on both sides, formed by the Big Thompson river. 

Devil's Gulch road, which begins at the hamlet of Drake, is also a fairly moderate climb up to Glenhaven. The steepest part of the road is about a mile past Glenhaven where for about a mile it climbs at an average grade of about 8%. There are a few sections that are much steeper. 

We turned back after the steepest section.

Refuelling possiblities: The "Dam Store" just before entering the Big Thomson Canyon (US-34W). We also saw a cherry pie store just after leaving the canyon. Drake has a bed and breakfast place where one may find water (or beer more likely). Glenhaven has a general store where you can get the basics. The storekeeper/owner usually keeps jugs of water outside the shop for bicyclists.

Traffic: On US-34 the traffic is medium to heavy. But there is a broad shoulder. Devil's gulch road has light to moderate traffic; no shoulders.

Scenery: Nothing short of spectacular.