Coming from out of town? Why not extend your stay and visit more of Colorado. Boulder and Denver have lots to offer. Rocky Mountain National Park is only an hour from Boulder.
The mountain towns offer a wonderful mountain experience:
Colorado's Rocky Mountains offer endless options for hiking, mountain biking, camping, rafting, backpacking, fishing, exploring, visiting hot springs, or just relaxing.
Colorado's other National Parks and Parks of the American West are within a day's drive:
Places to Visit (PDF)