Part of the Appalachian Trail Corridor, this National Natural Landmark has chasms, cliffs, four major waterfalls, smaller drops, pools, exotic flora, and intriguing rock formations like The Jaws, where outcroppings almost form a land bridge along the gulf or gorge. The West Branch of the Pleasant River drops a few hundred feet as it flows through 3-mile, slate-walled Gulf Hagas east of Greenville. Managed by Maine North Woods and open for public recreation, but not staffed like a park, this remote forest is accessible by gravel logging roads (always yield to logging trucks; roads aren't plowed in winter). A per-person fee is charged during the warm season at entry checkpoints or gates (cash or check only), where you can get trail maps and hiking information.
The difficult Rim Trail and the less challenging Pleasant River Tote Road are approximately 8 to 9 miles, depending on where you start; connector trails create shorter loops. Because of the rim trail's slippery rocks and rugged terrain, hikers are urged to wear sturdy footwear, not sneakers or sandals. Not up for such a rigorous trek? From either parking area you can hike to a premier waterfall on a route that only briefly includes the rim trail. These are good choices for families with young children and anyone lacking the preparation, experience, skill, and time the rim trail demands. From the Gulf Hagas (Lower Gulf) parking area, where most hikers start, it's a 3½–mile round-trip trek to spectacular Screw Auger Falls on the gulf's eastern end. After fording the Pleasant River—usually easily done in summer but dangerous in high water—you'll pass through The Hermitage, a stand of old-growth white pine. Near the falls, there's a stream crossing. From the Head of Gulf (Upper Gulf) parking area, the hike to Stair Falls at the gulf's western end is 3.4 miles round-trip. There's a bridge over the river—no fording required.