There is very little snow on the Iditarod Trail from Knik north to Nikolai, the first village beyond the Alaskan Range. But bad trail for the sled-dog racers is proving a boon for cyclists.Temperatures along the Iditarod Trail have dipped to 50 below zero in the past, but not this year. The temperature at Rainy Pass on Monday was 20 degrees, and the National Weather Service was forecasting even warmer weather north of the Alaskan Range that, too, helps the cyclists. Extreme cold invariably slows everything as the grease in wheel bearings become stiff.