Please be aware that the East Rim Drive is not flat. It has steep grades and is considered a strenuous ride for bicyclists. The park does not rent bicycles, so participants will need to bring their own.
People not wishing to bike may want to find alternate days to visit the park. Many viewpoints and hiking trails will not be accessible to motorists, and the West Rim Drive will likely be congested with automobiles (and bicyclists who are riding the full loop around the lake).