Official Course Map

The race courses for the Boulder Marathon and the Boulder Half Marathon are primarily on hard-packed dirt roads. If you are running or walking the Boulder Half Marathon, the section of the course on Niwot Road is paved. If you are running or walking the Boulder Marathon course, the section of the road on Nelson road is paved. The start/finish for both races is on a paved road (but that is only for about a quarter of a mile - until the runners and walkers exit the Boulder Reservoir). The rest of the marathon and half marathon courses are on dirt roads.

Course Map for the 2010 Boulder Marathon, Half Marathon & Marathon Relay: