The Thorofare and the South Boundary Trail

HARD 4 reviews
#69 of 168 trails in

The Thorofare and the South Boundary Trail is a 68.2 mile moderately trafficked point-to-point trail located near Yellowstone National Park, Wyoming that features a lake and is only recommended for very experienced adventurers. The trail offers a number of activity options and is best used from March until September. Horses are also able to use this trail.

68.2 miles 6351 feet Point to Point





nature trips


trail running


horseback riding





wild flowers






washed out

no dogs

6 months ago

6 months ago

3 years ago

This is a fantastic trail that is mostly un-hiked due to its location right next to the Yellowstone south entrance. The trail-head can be found a few hundred meters to the west of the Yellowstone park south entrance behind the horse corral. There is only a small sign that marks the trail-head making it a bit hard to find. Only a few hundred meters into the forest we noticed bear markings on trees. Bear bells, bear spray and being in a group of four or more will reduce the bear threat. Keep your eyes and ears open and there will not be a problem. It's also a good idea to let the rangers are the South Entrance that you will be hiking this trail and when you plan on returning.

This trail has some awesome scenery of the Polecat Creek, Birch Hills and the Grand Tetons to the South.

4 years ago

This was the start of it all. I worked at a scout camp and we guided backpacking trips down the Thorofare Trail. All the way down the east side, the trail is pretty flat. Check with local conditions, but most streams can't be crossed until late June depending on runoff. I remember seeing the streams full of Yellowstone Cutthroat Trout during spawning. Truly cool. This is bear country! The tall Ponderosa Pines were the back scratches for the bruins and were covered with fur and claw scratches. I'll have to locate a picture of my size 12 Scarpas being dwarfed by a grizzly paw print.

Trail was used by equestrians as well as boaters.