MAMMOTH HOT SPRINGS, Wyo. - Roads in Yellowstone National Park (YNP) will begin to close to oversnow travel March 7, YNP announced Monday.⯠Spring plowingâ¯will start as road segments close. They said all oversnow travel will end for the season March 15 at 9 p.m. Weather-permitting, someâ¯park roadsâ¯will reopen to automobile travel April 16 at 8 a.m. Road closure dates are as follows (gates close at 9 p.m.): ⢠March 7, Mammoth Hot Springs to Norris ⢠March 9, Norris to Madison, Norris to Canyon Village ⢠March 14, Canyon Village to Fishing Bridge ⢠March 15, all remaining groomed roadsâ¯â¯ Visitor services closure dates ⢠At Mammoth Hot Springs, the hotel and cabins, Gift Shop, Ski Shop and food services will close March 1. The Mammoth Campground, Yellowstone General Store, Post Office, Medical Clinic and self-serve fuel pumps stay open all year.