Overview
The Mill Creek Wilderness Trail follows Mill Creek upstream through the old-growth ponderosa pine canyon at the core of the Mill Creek Wilderness, one of the most significant concentrations of large-diameter ponderosa pine remaining in central Oregon. The 6.5-mile round trip stays close to the creek throughout, with fishing access, canyon views, and wildlife encounters in one of the Ochoco National Forest's most rewarding backcountry drainages.
No permit required. Dogs are welcome on leash.
The Route
Miles 0 to 2.0: Lower canyon approach. From the County Road 33 trailhead, the trail follows the creek upstream through open ponderosa pine forest. The trees here are among the oldest and largest in the Ochoco, with orange-plated bark and full crowns typical of mature old-growth pine. Canyon walls of volcanic tuff and basalt flank the drainage on both sides.
Miles 2.0 to 3.25: Middle canyon and upper creek. The canyon narrows and the old-growth increases in density. Multiple creek crossings appear in this section; rock-hops in summer, potentially wet crossings in spring. The creek pools in this section hold redband trout. The turnaround is at a wide gravel bar where the creek forks, a good fishing and rest stop.
Return. Retrace the creek route back to the trailhead.
When to Hike
May through June for full creek and spring green in the canyon. Early season visits may involve wet crossings.
July through September for the best fishing and dry crossings. The canyon shade makes this a good summer hiking option.
October for fall willow color along the creek and elk activity in the drainage.
What to Bring
Many hikers carry 1.5 liters of water. The creek provides water throughout (treat before drinking). Waterproof boots recommended for early season visits. Fishing gear if trout fishing is part of the plan.
Trailhead Access
County Road 33 northeast of Prineville, accessed via US-26 east. Follow signs for Mill Creek Wilderness and Steins Pillar. The Mill Creek Trailhead is before the Steins Pillar trailhead on the same road.
Practical Details
No permit is required for day hiking on this trail. Dogs are welcome on leash. No restroom facilities are at the trailhead; plan accordingly. Water sources are present along the trail but require treatment before drinking. No cell service is available in this area; download offline maps before leaving the main road.
The recommended season for this trail is May through October. Conditions outside this window may include challenging weather, trail closures, or reduced accessibility. Always verify current conditions with the Ochoco National Forest ranger district before visiting, particularly at the beginning and end of the recommended season when conditions are most variable.
The water feature along this trail supports a range of wildlife; keep pets on leash near the water. Wildlife is present throughout the forest. Maintain distance from any animals encountered on or near the trail. Old-growth forest is fragile; stay on the trail and avoid disturbing the understory vegetation.
Before any visit, review the Leave No Trace seven principles and our checking conditions guide for current fire restrictions, trail closures, and ranger district advisories. The America the Beautiful pass covers day use fees at developed recreation areas where applicable. Veterans and active military have additional access options covered in our veteran benefits guide.
Nearby
The Steins Pillar Trail accesses the ridge above the same Mill Creek drainage. The Black Canyon Wilderness Trail provides a comparable creek canyon experience in the south Ochoco. See the full Ochoco National Forest guide. Follow Leave No Trace principles throughout the wilderness.