We have drifted from the Glennifer dam down to RR 20 I believe it was, that was before the flood a few years back though, so not sure the condition of the RR20 road now. We spent most of the day on the river, but I think it is about a 4 hour straight drift, with little to no paddling. Current was about 2.5-3 mph when we went.
Lots of nice water, like mentioned a few sweepers but overall a pretty easy drift. Only caught one brown, but lots of rockies.
Pic of one of my sons on that drift