Bison Range opening for Mother's Day weekend Beginning on Saturday the 19-mile, one-way, gravel scenic auto tour will be open for visitors between 7 a.m. to 8 p.m. By: MTN News and last updated 2021-05-07 17:56:34-04 MOIESE â It is the season for the appearance of red buffalo calves at what is now known as the Bison Range in Moiese and that means the traditional re-opening of the Red Sleep drive over Mother's Day weekend has arrived. Beginning on Saturday the 19-mile, one-way, gravel scenic auto tour will be open for visitors between 7 a.m. to 8 p.m. The change means that over the next few months there will be a new look in signage and the remolding of the visitor's center, which is partially open.