Gunpowder Falls
Maryland · Baltimore County — Prettyboy Reservoir to Loch Raven
Brown TroutRainbow TroutBrook Trout
Top Fishing Locations on Gunpowder Falls
Upper Catch and Release — Prettyboy Dam to Blue Mount Road
The 7.2-mile artificials-only catch-and-release section from Prettyboy Dam downstream to Blue Mount Road is where Gunpowder Falls earns its Blue Ribbon reputation. Self-sustaining wild brown trout — no stocking — in cold 55-degree tailwater that fishes year-round. Access via Masemore Road and Falls Road, both off I-83 at the Hereford exit. The upper section near Falls Road has boulders, pocket water, and rapids that give way to the slower flat meadow sections near Masemore Road. Both characters fish well but require different approaches. This is one of the finest wild trout tailwaters on the East Coast and the proximity to Baltimore means it does see pressure on weekends — weekday mornings are the move.
💧 Ideal flow: stable tailwater releases from Prettyboy Reservoir keep the upper section fishable year-round. Best between 60 and 200 CFS. Higher flows push fish tight to the banks and into slower water near structure. Low clear conditions require smaller patterns and longer leaders. Check the gauge before making the drive.
📊 Get Location Flow Report
Middle Section — Blue Mount Road to Corbett Road
The 4.2-mile middle section below Blue Mount Road allows harvest of two fish per day and receives stocked rainbows in addition to wild browns. This section sees less pressure than the upper catch-and-release water because most visiting fly fishers head straight for the wild fish above Blue Mount Road. The middle section fishes well and the Little Falls confluence just below Blue Mount Road Bridge is worth targeting specifically — when main river flows run low, Little Falls brings cold water in and fish stack at the confluence. Good access via the Torrey C. Brown Rail Trail which runs the length of the river corridor.
💧 Ideal flow: the middle section is more forgiving across a range of flows than the technical upper section. The Little Falls confluence is especially productive when main river flows are low — the tributary keeps temperatures down and concentrates fish.
📊 Get Location Flow Report
Lower River and Glencoe — Put and Take Section
Below Corbett Road the lower Gunpowder is managed as a put-and-take fishery stocked with 7,000 rainbow trout annually with a five fish daily limit. This section flows through the towns of Monkton, Sparks, and Glencoe before reaching Loch Raven Reservoir. The lower river is more accessible and less technical than the upper sections and is a good option for anglers new to the Gunpowder system or looking for a more relaxed day on the water. The USGS gauge at Glencoe provides flow readings for the lower river. Access via Monkton Road and Corbett Road.
💧 Ideal flow: the lower river is more affected by runoff than the cold tailwater sections above — give it a day or two to clear after significant rain. The put-and-take section fishes well at moderate flows when visibility is good.
📊 Get Location Flow Report
About Gunpowder Falls Fishing
Gunpowder Falls is Maryland's premier fly fishing destination — a Blue Ribbon wild trout tailwater less than an hour from Baltimore that fishes year-round thanks to cold 55-degree releases from Prettyboy Reservoir. The river flows south through Gunpowder Falls State Park for nearly 20 miles before emptying into Loch Raven Reservoir, another Baltimore water supply. The upper 7.2 miles from the dam to Blue Mount Road are artificials-only catch-and-release with a self-sustaining wild brown trout population — no stocking in this section. Below Blue Mount Road the regulations relax and the river transitions through a two-fish harvest section before becoming a stocked put-and-take fishery near the lower reservoir. The Torrey C. Brown Rail Trail runs the length of the river corridor and gives anglers walking access to water that doesn't see pressure from road-accessible spots.
Best Time to Fish Gunpowder Falls
Year-round tailwater fishing is the Gunpowder's defining characteristic. Winter midge fishing from November through March is consistent and often productive on the upper catch-and-release section. Spring BWO hatches from March through May bring fish to the surface on overcast days. Sulphur hatches in May and June are the signature dry fly event. Summer terrestrial fishing with ants and beetles is effective throughout the warm months — the rhododendron and laurel canopy keeps the water cool even on hot days. Fall brings streamer opportunities as browns get aggressive pre-spawn. Maryland bans felt-soled waders and boots — rubber-soled only on this river.
Species
Wild brown trout dominate the upper catch-and-release section with no stocking. The upper section holds a self-sustaining population of browns that have never been stocked — fish that are selective, conditioned to angling pressure, and genuinely challenging. Some rainbow and brook trout exist in the upper section as well. The middle section receives stocked rainbows in addition to wild browns. The lower put-and-take section is primarily stocked rainbows with a five fish daily limit.
Access and Regulations
Upper section (dam to Blue Mount Road) — artificials only, catch-and-release, year-round. Middle section (Blue Mount to Corbett Road) — two fish per day. Lower section (Corbett Road to Loch Raven) — five fish per day, stocked. Maryland fishing license required for anglers 16 and older. Felt-soled waders and boots are banned statewide in Maryland — rubber-soled only. Primary access via I-83 at the Hereford exit — Masemore Road and Falls Road parking areas for the upper section. Torrey C. Brown Rail Trail provides additional access throughout.
Live River Data
Streamflow data is pulled in real time from the USGS National Water Information System. Gunpowder Falls runs on Prettyboy Reservoir releases which are relatively stable but can fluctuate. Check the gauge before making the drive especially after significant rain events which can affect clarity in the lower sections.