Biking is not the primary activity in Yosemite National Park. However, many visitors do take advantage of the twelve miles of paved bike paths. In addition, bicyclists can ride on the regular roadways, providing that they obey all regular traffic laws - obey all posted traffic signs and travel with the flow of traffic when on roadways used by automobiles. Also, note that helmets are required by law for any person under eighteen years of age. Off-trail riding and mountain biking are not permitted in Yosemite National Park. All bikes are prohibited from pedestrian and hiking trails.
For bicyclists traveling near or through the area, there is a wonderful eight-mile round trip bike ride that can take you to absolutely spectacular sights. It is the paved trail through Yosemite Valley and although not technically challenging, the scenery along the way is breath taking. The route meanders through the Valley, taking you by Yosemite Falls and Lower Yosemite Fall. At the far end of the bike route is Mirror Lake. Although this lake is going through the natural process of filling with silt and drying up to become a meadow, the views of Half Dome from here are incredible.
For those who love to ride their bikes, peddling part of the way into or around Yosemite National Park, has to be a part of their vacation plan while here!