Tucannon River & Diamond Peak Loop Professional Review and Guide
"This loop provides a vigorous two-day, or a more leisurely two-and-a-half-day, backpacking trip with a good option for a shorter loop. Because of the scenic vistas, it’s a fine introduction to the Wenaha-Tucannon Wilderness, a land of rocky canyons. Elk hunting season, which opens in late October, tends to be the busiest time in this area.
From U.S. Highway 12 about 4 miles west of Pomeroy, Washington, (or 8 miles east of the junction with State Highway 127) turn south on Tatman Mountain Road. Follow the signs for Camp Wooten, joining the Tucannon River Road after 9 miles. (Note: Hikers coming from points farther west should get on the Tucannon River Road at Dayton.)"