Lewis and Clark Honor Guard www.corpsofdiscovery.org - Is a non-profit organization Montana corporation. Members research and dress as Lewis and Clark expedition members and conduct demonstrations, flag ceremonies, and daily life skills of the Expedition.
Lewis and Clark Interpretive Association www.lewisclarkia.com - The Lewis and Clark Interpretive Association works to enhance the learning experience about the Lewis and Clark Expedition.
Lewis and Clark Trail Heritage Foundation www.lewisandclark.org - Their stated purpose, “to stimulate nationally public interest in matters relating to the Lewis and Clark Expedition, the contributions to American history made by the Expedition members and events of time and place concerning and following the Expedition which are historically important to our nation.”
Portage Route Chapter www.corpsofdiscovery.org - The PRC’s objectives are to educate the public and its members about the Expedition and its accomplishments. The PRC prides itself on presenting accurate programs in cooperation with the Interpretive Center and offering field trips to sites along the LC Trail.