me and the wife were in yellowstone and went to hike into a lake that had grayling in it. someone told us it was a 3 mile round trip. we were in sweats over out shorts cause the weather had been good. had wool hats and gloves on but no coats. started in and it started snowing hard and wet. finally get to the lake and just turned around cause we werent dressed for it. seemed like 3 miles one way im sure. on the way out we met all these hikers dressed for the weather giving us funny looks. we sure werent prepared for 7000 ft and september 1 weather changes