Originally Posted by pdlamb

+1


If you can arrange to arrive a day early, and maybe do a short, easy (10 mile?) spin, you'll cut the chances of having problems way down.

Originally Posted by raceboy

Also, your body will adjust to the altitude change after you've spent a day or two at the higher elevation.

Originally Posted by gsa103

Your power output will drop by about 10% initially, and slowly improve until you're at about 95% of normal. You'll go slower on the climbs.

Joe Friel - Altitude and Aerobic Performance

You'll be slightly slower on climbs but beyond that nothing significant. In general, healthy individuals won't have any issues below 8000ft (other than the loss of power).

Originally Posted by caloso

This is my experience. I live in Sacramento (elev. 25) and we have a place in Tahoe City (elev. 6200). After you've spent a night at the higher elevation, you'll be pretty acclimated.