docbluedevil,
where in colorado do you live? i live in the springs and ride around here and manitou... i ride my brakeless fixies around here using 40:15 on my conversion and typically run 48:16 on my track bike for around town, but just changed my racing ratio to 50:15 (from 48:14) and have been riding that for track and street... i'll even ride through garden of the gods fixed, but i leave my serious climbing to my road bike. i love gold camp road and riding up to the zoo... etc. the hill up to my girlfriend's house in manitou is damn near impassible on my track bike. it's a face shaker for sure.

an old road rider i know used to train with the oylmpic road team in the 70's and they used to do steep climbs and even passes on fixies with brakes and ran 42:18. i think with that high of a spin i would want a freewheel on the decents...