Lolo

A 51-acre (21-ha) park. Significant archeological findings made in 2002, including latrine sites with traces of mercury and fire hearths, make this the only site on the Lewis and Clark National Historic Trail that has yielded physical proof of the explorers' presence. This spot is largely unchanged from the days of Lewis and Clark. From this location, Lewis and Clark split up to explore Montana during their return trip, not reuniting until they reached Sanish, North Dakota.

Good Nordic Ski trails groomed Saturday/Sunday early mornings by the Clearwater National Forest contractor, which offer excellent classic and skating tracks. There's also a warming hut and a staffed lodge at the pass.

Offers two pools fed by geothermal springs: an outdoor swimming pool and a hotter (110-116 °F) indoor soaking pool. The springs are clothing-optional after 9PM on Wednesday and Sunday nights.

The springs themselves are less than a mile hike in, and are large enough to accommodate a couple of dozen people. These springs are also clothing optional. If the springs are packed, as they often are, try hiking a quarter-mile further down the trail to two smaller hot springs.

A smaller hot spring about a mile in on a narrow and hilly trail, which can be treacherously icy in the winter and spring. Although the drive is longer and the hike harder, visitors to Weir are compensated by smaller crowds than at Jerry Johnson. In addition, the Forest Service allows camping at Weir, unlike at Jerry Johnson.