Wallowa–Whitman National Forest, National Forest in northeastern Oregon, United States.

The Wallowa–Whitman National Forest covers 2,300,000 acres in northeastern Oregon and small parts of Idaho, including 600,000 acres of designated wilderness. Its largest section lies in the Wallowa Mountains south of Joseph, where the alpine heart of the range forms the Eagle Cap Wilderness. A separate section west of La Grande and Baker City runs through the Elkhorn Mountains, and the forest also manages Hells Canyon National Recreation Area, the deepest gorge in North America.

The Nez Perce lived in the Wallowa Valley from around 1400 CE, and it was the summer home of the Joseph Band. In 1905 President Theodore Roosevelt established the Wallowa Forest Reserve and Chesnimnus Reserve; these became the Imnaha National Forest in 1907 and the Wallowa National Forest in 1908. The Wallowa and Whitman national forests were administratively combined in 1954.

The name honors both the Wallowa band of Nez Perce and missionaries Marcus and Narcissa Whitman who arrived in 1836. Today these names serve as a reminder of how indigenous peoples and European settlers shaped this landscape.

A Northwest Forest Pass is required for parking at most trailheads, and activities like firewood cutting or river rafting need special permits beforehand. Check regulations before your visit as requirements vary by season and specific location within the forest.

The forest's name combines the Wallowa band of the Nez Perce, who lived here from around 1400 CE, with Marcus and Narcissa Whitman, Presbyterian missionaries who settled just north in 1836. A 20,500-square-foot log visitor center and district office in Enterprise burned to the ground on July 11, 2010.