April and May in the canyon
Pine Creek turns south at Ansonia, where Marsh Creek joins it, and drops into the gorge that the state parks call the Pennsylvania Grand Canyon. The 3.35 miles from the Marsh Creek confluence down to Bear Run are the delayed-harvest water, 100 to 150 feet wide, deep and quick, with long runs and pools that hold the large Keystone Select fish stocked each spring and fall. Spring is the season here. Little Black Stoneflies come off in March, Hendricksons, Quill Gordons and Blue Quills in April, Grannoms at the end of April, and March Browns, Sulphurs and Green Drakes through May; Ralph Scherder of Dark Skies photographed a Hendrickson spinner fall on May 24 that filled the air.
Fish it in pieces. Scherder's advice for the DHALO is to pick one run and work it, add a small split shot above the nymph even under an indicator, and do not ignore the knee-deep flats along the edges where the bigger browns cruise during a hatch. The river is 40 miles from Wellsboro's shops and lodges, so the parking areas fill on May weekends, but the water is big enough that it never feels that way.
The June problem, and where to go when the creek hits 70
Pine Creek is a freestone with a dam at Galeton and no cold source, and the canyon usually stays fishable into June while the water around Slate Run warms sooner. When the Cedar Run gauge reads low 70s, the trout are in the tributary mouths and the smallmouth are in the main stem below Waterville. That is when you fish Slate Run, Cedar Run and the other Class A wild trout tributaries, most of them brook trout water in their upper reaches, or drive to the limestone streams around State College.
The USGS record explains the calendar: the median flow at Cedar Run is roughly 1,250 to 1,470 cfs in March and April, 840 in May, 340 in June and around 100 to 160 cfs from July through September. The spring numbers are float flows and the summer numbers are bass flows.
September: Slate Run stocking and the fall window
Below the canyon the creek picks up Cedar Run and then Slate Run, and the 2.88 miles from the Slate Run confluence downstream to Bonnell Run at the DCNR Clark Farm access is the second special-regulation stretch, stocked by the PFBC and by the Slate Run Brown Trout Club. The club and Wolfe's General Store run the fall stocking from the shop at 10 a.m. on a late-September Saturday (September 26 in 2026), and the shop's report that week put water and temperatures in the low to mid 60s with Blue-Winged Olives and Slate Drakes on the water. October brings the big browns out and the crowds go home.
Getting to the water: Darling Run, Owassee Road, Rattlesnake Rock
The east bank of the DHALO is reached from the Darling Run access off Route 362, from which the Pine Creek Rail Trail follows the creek the length of the gorge; walk or bike as far as you want. The west bank is reached by Colton Road out of Ansonia to Owassee Road, an unmaintained dirt road that drops steeply to the water and follows it for about a mile before dead-ending, with pull-offs along the way and a surface that punishes low cars. Tiadaghton Campground on Tiadaghton Hill Road is the only other road access in the canyon. Downstream, Blackwell and Rattlesnake Rock have DCNR lots, and Route 414 parallels the creek from Blackwell through Cedar Run and Slate Run to Waterville with pull-offs the whole way. Pine Creek Outfitters near Rexford does shuttles and rentals for canoe or raft floats through the gorge.
Wolfe's wading chart, translated to cfs
Wolfe's General Store in Slate Run, which houses the Slate Run Tackle Shop, publishes the wading chart everyone on this creek uses, keyed to the stage at the Cedar Run gauge, and its own conversion table: 1.64 feet is about 300 cfs, 2.01 feet about 570, 2.49 feet about 960, 3.00 feet about 1,400. Between 1.5 and 1.9 feet the shop says you can wade about half the stream with caution; 2.0 to 2.4 feet, about a quarter; 2.5 to 2.9 feet, only the edges near the bank; 3 feet and up, no wading. Below 1.5 feet most of the stream opens up.
This page compares the live gauge to 250 to 600 cfs, which is the shop's half-the-stream band and matches the 500 to 600 cfs that Pennsylvania anglers on the Paflyfish board call a good fishing level, with 800 to 900 cfs the point where wade fishing gets hard in most spots. Wolfe's also links the Waterville gauge downstream for the lower creek and Young Womans Creek and Kettle Creek for the tributary options.
Marsh Creek to Bear Run, Slate Run to Bonnell Run: the rules
The 2026 PFBC summary lists Pine Creek in Tioga County, 3.35 miles from Marsh Creek downstream to Bear Run, as Delayed Harvest Artificial Lures Only and a Keystone Select stocked water: open year-round, artificial lures and flies only, no trout may be killed or possessed from the day after Labor Day until 8 a.m. on the first Saturday after the opening day of trout season the following year (wait for June 13 in 2026 before keeping a fish), and then 3 trout of at least 9 inches per day through Labor Day. Older web pages still describe this as a 1-mile section from Darling Run to Owassee Slide Hollow; the current boundaries are the ones above.
Pine Creek in Lycoming County, 2.88 miles from the confluence with Slate Run downstream to the confluence with Bonnell Run at the DCNR Clark Farm access, is Catch and Release All Tackle: open all year, 24 hours, any bait or lure, no trout killed or possessed at any time. Between Bear Run and Slate Run, and below Bonnell Run, the creek is a stocked trout water under inland rules: the April 4 opener, 7 inches, 5 trout through September 7, 3 in the extended season. Cedar Run and Slate Run themselves are catch-and-release fly-fishing-only (Cedar Run, 7.33 miles from Buck Run to the mouth) and Class A wild trout water; check them in the summary before you fish the tributaries.