Greenfield Flat Trail - Hiking trail near Boise, Idaho, United States - Description

The Greenfield Flat trail is an old road that begins at the end of National Forest Road 646C (NF-646C). The trail climbs gradually then steepens as it passes through a mature pine forest and comes out onto a wide flat ridge top, where there is a 360-degree view. The trail travels through grasses and small aspens along this ridge, while to both sides of the trail, dense forest and low brush exist. This ridge also serves as a cattle driveway.

After crossing the ridge, the trail turns sharply and drops down onto the flats, which are an expansive, gently sloping grassland dotted with an occasional clump of subalpine fir and spruce. Once on the flats, the trail turns east again and climbs up through the flats to a wide saddle where it ends at its junction with the Wilson Creek Trail. This junction is not signed. The Wilson Creek Trail provides access to the Poison Creek Trail and the West Mountain Trail.

From intersection of State Hwy 52 and the Sweet/Ola Road: go north on the Sweet/Ola Road (NF-618) to the Forest Boundary 17.5 miles north of Ola. Continue north on NF-618 about 6 miles to the junction with NF-625. Turn right onto NF-625 and travel about 5.6 miles to the junction with NF-646. Turn left onto NF-646 and about 1.8 miles to the first switchback and NF-646C. Turn left onto NF-646C and travel 0.5 miles to the end of NF-646C at its junction with NF-646D and an unnamed road. The trail is the unnamed road that is covered with sharp rocks, and turns steeply uphill.