Lewis and Clark National Historic Trail – Idaho

National Monument in Idaho

Today you can still experience the Trail as Lewis & Clark’s Corps of Discovery did. Hike Idaho’s Bitterroot Mountains and follow the centuries’ old footsteps of the Salish, the Nez Perce, and the Corps of Discovery.

The Lewis and Clark National Historic Trail is approximately 3,700 miles long, extending from Wood River, Illinois, to the mouth of the Columbia River, near present day Astoria, Oregon, following the historic outbound and inbound routes of the Lewis and Clark Expedition. The trail connects 11 states (Illinois, Missouri, Kansas, Iowa, Nebraska, South Dakota, North Dakota, Montana, Idaho, Washington, and Oregon) and many Tribal lands.

The trail was established by Congress in 1978 as part of the national trails system (NTS) as one of four original national historic trails. Today, visitors can follow the approximate route of the Corps of Discovery using a variety of transportation methods and interpretive means.

Things To Know

  • There is no fee to travel the Lewis and Clark National Historic Trail. There are, however, many sites along the trail operated by a variety of agencies and organizations who may charge an entrance fee to their site or a fee for their programming.
  • In winter, watch for ice on trails and sidewalks. In summer, make sure to drink plenty of water and wear sunscreen on hot days.