Columbia River Gorge Biking
The Historic Columbia River Highway, and especially the Historic Columbia River Highway State Trail, are excellent cycling routes. While the highway can be crowded on weekends, the traffic is slow. The Historic Columbia River Highway State Trail is closed to all motor vehicle traffic, and is paved for most of its route.
Columbia River Gorge Bike Map (Requires Adobe Acrobat)
A must-have if you are planning a bike trip in the gorge. Comprehensive map Columbia River Gorge biking published by the Oregon Department of Transportation. Route and elevation maps of the Historic Columbia River Highway from Portland to The Dalles, and Washington SR14 from Vancouver to Horsethief Lake State Park. Includes tips for a safe ride, items to bring along, info on lodgings, weather, museums, parks and campsites.
ODOT published a series of three new cycling maps in 2014, which I think are inferior to the original bike map, but here they are:
Historic Columbia River Highway State Trail
Oregon Parks and Recreation Department site. Includes facilities information and detailed maps of two restored sections of the highway open only to pedestrian and bicycle traffic.
Columbia River Gorge NSA Road Cycling Trails
A great way to enjoy the Historic Columbia River Highway is by bicycle. Weekends are a busy time on the Highway for both vehicle and bicycle traffic.
Columbia River Gorge NSA Mountain Biking Trails
CRGNSA has a few trails open to mountain bike use. Please remember to stay on the designated trail — off roading damages sensitive resources. Cross-country ski trails, old logging roads and paved back country roads provide bikers with a wide variety of biking opportunities. Be sure to check with other area Forest Service offices for additional biking opportunities.