Most of these are from July of 2007. My 2 sons, then 16 and 18, accompanied me on a 20 mile hike on the Bighorn Pass trail. The trail starts at the Indian Creek Campground between Norris and Madison at an elevation of around 7,000 feet. In 8 miles it climbs to 9,100 feet then drops back down into the Gallatin River basin on the western side of the park. It was a memorable trip that included warm sunshine, cool breezes, thunder, lightning, hail and temps ranging from the mid 70's to the upper 40's at the pass. Our campsite, the first available due to the grizzly management area was 12 miles from the trailhead. Beautiful scenery, physically challenging, and 34 years in the making.
I am not an expert on the trail, by any means, but if you have any questions, feel free to contact me and I will be happy to give you my perspective on it.