Overview
The Emerald Creek Garnet Area Trail in St. Joe National Forest offers one of the most unusual hiking experiences in the Pacific Northwest: a scenic forest loop combined with the chance to dig for Idaho's official state gemstone. Emerald Creek is one of the few places in the world where star garnets occur in significant concentrations, and the USFS operates a public digging area that draws gemstone enthusiasts and curious hikers alike.
The 4.5-mile loop follows Emerald Creek through a narrow canyon lined with old-growth western red cedar and Douglas fir before climbing gently onto the ridge and looping back. The creek itself is clear and cold, with deep pools that support cutthroat trout. Interpretive panels along the route explain the geology and mining history of this unique area.
The Route
The trail begins at Emerald Creek Campground and descends to the creek, following the streambank north through the cedar grove. The garnet digging area sits about a mile from the trailhead, where gravel bars and shallow digging pits are designated for public use. The trail continues up the canyon before climbing the ridge on the loop section, passing through mixed forest with views down into the creek drainage. The descent returns through younger forest to the campground.
What to Expect
The loop format keeps the hike interesting throughout. Hikers who plan to dig should bring a small bucket and garden hand tools. Garnets are found in the creek gravel and the clay-rich soils of the digging area. Most visitors find at least a few rough stones, though gem-quality finds require patience and a practiced eye. The creek section involves some boulder hopping in high water.
Nearby
The town of Clarkia sits about 8 miles north on Idaho Highway 3 and provides basic services. The St. Joe River Trail runs east from the area and offers longer river corridor hiking. The Huckleberry Trail to the north provides a contrast with its ridge-top perspectives above the forest canopy.
Leave No Trace
This trail receives enough use that following Leave No Trace principles is important for preserving the experience for future visitors. Stay on the marked trail to prevent erosion. Pack out all waste. Avoid camping within 200 feet of water sources or the trail. Use existing fire rings only where campfires are permitted, and check current fire restrictions at checking conditions before you go before any visit. The trail and surrounding terrain remain in good condition because previous visitors have respected these norms.