Heybrook Lookout overlooks the Skykomish River valley and southward into the Index/Proctor Creek Drainage (FS62). The trailhead is a mile or so east of the Index-Galena Road turnoff and the Espresso Chalet . . . a large gravelled pulloff on the north side of SR2 just as you pass the sign announcing your entering of the Mt Baker-Snoqualmie National Forest.
The trail is a short one and a half miles long, moderately steep under dense canopy until you reach a breakout on the ridge just below the line-of-sight clearcut for the lookout. During the summer fire season the lookout is manned by fire lookouts on the topmost level. During the off months the lookout is unoccupied. The level below the lookout cabin is open year-round for hikers to enjoy.