The Green Monster Loop is a rugged 14.3-mile circuit in Tioga State Forest that rewards solitude-seeking backpackers with excellent creek scenery, technical challenges, and surprising isolation despite its proximity to Pennsylvania's Grand Canyon. This is not a manicured trail—expect faded blazes, unbridged stream crossings, and sustained climbs that will test your navigation skills and fitness. The route is primarily maintained by volunteers from the Tyoga Running Club and sees far less traffic than nearby trails, making it ideal for backpackers who value peace over polish. Plan for a challenging overnight trip with an early start, especially if attempting the full loop in one push.
No permit required for dispersed camping if staying only one night at each location. If you want a campfire during spring wildfire season (March 1-May 25), you must obtain free authorization from the Tioga State Forest district office at 570-724-2868. Campfires are prohibited March 1-May 25 without authorization and anytime fire danger is high, very high, or extreme. Camp stoves are always permitted. Maximum 7 consecutive nights camping; must wait 48 hours before resuming. Groups larger than 10 people require a Letter of Authorization from the district office. Standard Leave No Trace principles apply.
Official regulations: https://www.pa.gov/agencies/dcnr/recreation/what-to-do/stay-overnight/backpacking-and-primitive-camping
Optimal: September through early November. Fall offers reliable water, comfortable temperatures, stunning foliage (peak colors early-to-mid October), fewer bugs, and minimal fire restrictions. Late April through May brings wildflower blooms and swollen creeks but also spring fire restrictions (no campfires without permit) and early-season ticks.
Avoid: May-July due to peak tick and mosquito activity, with nymphal ticks (hardest to spot, highest disease risk) most active May-July. Also avoid high water events in spring when stream crossings become dangerous.
Winter: Accessible year-round but expect snow and ice; technical descents become hazardous. No tick/mosquito concerns November-March.
Summer: Hot, humid, buggy, and campfire restrictions when fire danger is high.
Water is abundant from numerous creek crossings—Straight Run, Right Branch Canada Run, Oil Well Hollow, and various tributaries. Stream crossings occur every 1-2 miles on average. Water is most reliable March-November; some smaller tributaries may run low in late summer drought. Straight Run (the trail's highlight) maintains flow year-round with cascades, pools, and small waterfalls. Filter or treat all water sources.
No resupply on trail. Wellsboro (15 minutes east of trailhead) offers full services: Weis Markets and Tops Market for groceries, Wild Asaph Outfitters on Main Street for gear and fuel canisters, plus restaurants and lodging. No mail drop options reported.
Navigation: This is the trail's biggest challenge. Yellow blazes are faded, far apart, and sometimes nonexistent. "Many places to make wrong turns because nothing is marked," per multiple reports. Download offline maps (Purple Lizard Maps recommended) and know how to read them. GPS track strongly advised.
Stream crossings: Expect 10-15 unbridged creek crossings, some "sizeable and very dangerous in high water." Plan for wet feet. Scout crossings in high water and be prepared to wait or turn back if unsafe. Avoid this trail during/after heavy rain or snowmelt.
Technical descents: Frankenstein's Forehead—an 800-foot descent into Straight Run—is "extremely steep" with "loose rocks and debris." Take your time with a heavy pack. Trekking poles highly recommended.
Wildlife: Tioga State Forest is one of Pennsylvania's most rattlesnake-dense areas. Timber rattlesnakes active April-October; maintain 3-foot distance, watch where you place hands/feet in rocky areas. Black bears present but typically avoid humans—use standard bear-safe food storage.
Ticks: Peak risk May-July with nymphal deer ticks. Perform thorough tick checks. Lower risk November-March.
Trailhead: 176 Straight Run Road, Wellsboro, PA (approximately 41.789985, -77.403264). From Wellsboro, drive west on US Route 6 for about 15 minutes, turn onto Straight Run Road. Limited parking at trailhead; overflow parking available at USGS Fish Lab down the road. No fees.
Nearest airport: Williamsport Regional (IPT), 45 minutes south.
Road conditions: Paved access to trailhead area; suitable for all vehicles.
Shuttle: Not needed (loop trail). No commercial shuttle services reported.
Camping strategy: Limited established sites; look for flat spots on ridges or just above creek bottoms. Hemlock groves near the top of Darling Trail offer good camping. Areas along Straight Run have nice spots near water but can be sloped—scout carefully. Both tents and hammocks work; hemlocks provide good hang points.
Timing: Start early—allow 7-8 hours moving time for the full loop. Most backpackers camp after 7-10 miles near Straight Run to enjoy the creek scenery.
Map: Purple Lizard Maps' Pine Creek/Pennsylvania Grand Canyon map ($14, waterproof) covers the Green Monster and is essential given poor blazing. Available at Wild Asaph Outfitters in Wellsboro.
Direction: Loop can be hiked either direction. Clockwise brings you to Straight Run (highlight) in the second half when you're ready for scenic creekside hiking.
Water treatment: Bring extra capacity—crossings can be spaced 2-3 miles apart on some sections despite overall abundance.
Pick your trailheads, choose campsites, and build a day-by-day itinerary. Hikeset tracks your gear, meals, and group so nothing gets left behind.
Start PlanningFree account. No credit card needed.
Hikeset Beta
