Calendar of Events & Meetings

This year, Manhattan Project National Historical Park and Sacajawea Historical State Park rangers will be joined by Lewis and Clark National Historic Trail, Ice Age Floods National Geologic Trail, and Whitman Mission National Historic Site rangers and volunteers. Children of all ages are invited to earn a special Junior Ranger badge by participating in fun activities. There will be ranger-led nature walk at 12:00 pm. REI also be there encouraging participants to recreate responsibly, including information about Leave No Trace principles and the 10 Essentials.

Activities are weather dependent so please check the MPNHP Facebook Page for updates on the day of the event. For questions, contact National Park Service.

The event is free, and it is a Discover Pass Free Day for Washington State Parks as well! 

Sacajawea Historical State Park is a Washington State Park at the confluence of the Snake and Columbia rivers where the Lewis and Clark Expedition camped. The state park bears the name of Sacagawea, a Lemhi Shoshone woman who helped the Expedition. 

Manhattan Project National Historical Park interprets one of the most transformative events of the 20th that ultimately ushered in the nuclear age with the development of the world’s first atomic bombs.

Whitman Mission National Historic Site preserves a sacred piece of Cayuse homeland and interprets the events surrounding the Christian mission established in 1836 and its lasting impacts.

Ice Age Floods National Geologic Trail was established to recognize the national significance of Ice Age floods that left a lasting mark on the landscape of the Pacific Northwest. Lewis and Clark National Historic Trail commemorates the 1803 to 1806 Lewis and Clark Expedition, interpreting the historic, cultural, and natural resources associated with the expedition and its place in U.S. and tribal history.