Pass Post Office was established alongside the stage road in 1888 by Thurston W. Akins on his homestead on Twin Creek, five and a half miles northwest of Ohlman and three quarters of a mile south of the Wyoming-Montana line. The post office served 150 people in the area, and the small town of Pass was built here. Just south of Pass, the stage route diverted from the Bozeman Trail and continued north to Fort Custer and to Custer Station and Junction on the Yellowstone River, while the Bozeman Trail turned northwest to the Big Horn River. Pass consisted of several small frame buildings built along the west side of the stage road, all facing east. The community existed here until 1894, when the post office was moved two and a half miles south to Parkman. Some of the buildings were moved away, and the rest were torn down or decayed. Eventually the foundations were leveled. Nothing remains of Pass today, but the swale of the old stage road is still visible running north-south across the field.