Many of the gravel roads make excellent mountain bike routes. Some provide a variety of loops to challenge your endurance and skills.
Test your skills at the Mountain Bike Park, Mt. Hood Ski Bowl, 503-282-3206, www.skibowl.com. Connects with more than 40 miles of bike trails. Mountain bike rentals, guided tours, and race clinics are available. You can ride the lifts with your bike to the top.
Road biking is also popular on the paved road system in the Government Camp area.