bogus basin road. especially fixed, just push yourself until you just can't go any farther up...it might not be far, or long, but if you keep hill-climbs a part of your regular regimen, it'll really help strengthen you up. i used to bogus on my road bike, now i do mt. tabor fixed. not as often as i should, but shhhh....
one thing i forgot about boise, now that i'm in town, is how much thinner the air is here than in portland. i'm going to be a bit slower than some other people, i think.