Grand Teton has few designated bike paths, so cyclists should be very careful when sharing the road with vehicles, especially RVs and trailers. A bike lane allows for northbound bike traffic along the one-way Jenny Lake Loop Road, a one-hour ride. The River Road, 4 mi north of Moose, is an easy four-hour mountain-bike ride along a ridge above the Snake River on a dirt road. Bicycles are not allowed on trails or in the backcountry.