Piedra River
Fly fishing in Colorado · Intermediate · Best seasons: Summer, Fall
Target Species
Brown Trout, Rainbow Trout
About This Water
Remote San Juan Mountains river with wild trout. Excellent dry fly fishing in pristine wilderness.
Fishing Recommendations
The Piedra River in Southwest Colorado is one of the state’s true hidden gems. Tucked away between Pagosa Springs and Durango, it is a wild, rugged, and breathtakingly beautiful drainage that offers a "backcountry" feel without requiring a week-long expedition. It is one of the few rivers in Colorado that remains largely undammed, allowing for a natural flow and a pristine ecosystem.
🎣 Location Overview
The Piedra is characterized by dramatic limestone canyons, towering ponderosa pines, and a classic "pool-drop" structure. What makes it special is its diversity: you’ll find everything from fast-moving pocket water and heavy rapids in the canyons to meandering meadow stretches in the upper reaches.
Anglers love the Piedra because it rewards effort. While the river near the bridge access points can see some pressure, a two or three-mile hike into the Piedra River Canyon or the Weminuche Wilderness sections yields solitude and aggressive fish that aren't as "educated" as those on the nearby San Juan tailwater.
🐟 Target Species & Behavior
- Brown Trout: The kings of the Piedra. They dominate the deeper canyon pools and the undercut banks. They are opportunistic but wary; they love structure and will often hold in the dark shadows beneath the limestone cliffs.
- Rainbow Trout: Found primarily in the swifter riffles and at the heads of pools. The Piedra rainbows are known for their strength, often utilizing the heavy current to their advantage once hooked.
- Native Cutthroat: While rarer in the main stem, you may find them in the higher headwaters and tributaries.
Behavior: During the summer, these fish are "upward-looking." They rely heavily on terrestrial insects falling from the steep canyon walls and the prolific hatches that occur in the oxygenated water.
📅 Best Times to Fish
- Optimal Seasons:
- Summer (Late June – August): This is the prime window. Post-runoff (usually mid-to-late June) is when the river comes alive. The Stonefly hatch in late June is legendary.
- Fall (September – October): My personal favorite. The water is low and crystal clear, the crowds vanish, and the Brown Trout become aggressive as they prepare for the spawn.
- Best Times of Day:
- In the heat of summer, the "magic hour" is from 9:00 AM to 2:00 PM for hatches, and again at dusk for caddis activity.
- In the fall, wait for the sun to hit the water (10:00 AM) to activate the insects.
- Prime Windows: The "shoulder" of the runoff is the best time for trophy fish. As the water clears but remains high, the big fish feel safe moving out of the deep holes to feed.
🪰 Recommended Flies & Techniques
Top Fly Patterns
- Dry Flies:
- Stoneflies: Chubby Chernobyl (Gold, Orange, or Royal) sizes 6–10.
- Terrestrials: Amy’s Ant, Black Foam Beetles, and Dave’s Hopper.
- Mayflies/Caddis: Parachute Adams (14–18), Elk Hair Caddis (12–16), Stimulators (Orange/Yellow).
- Nymphs:
- Pat’s Rubber Legs (Black/Brown), Prince Nymphs (12–16), Pheasant Tails (14–18), and Perdigons for the fast pockets.
- Streamers:
- Woolly Buggers (Black or Olive), Autumn Splendor, and Sparkle Minnows.
Techniques
- Dry-Dropper: This is the bread and butter of the Piedra. Run a large, buoyant Hopper or Stonefly pattern with a weighted nymph (like a Copper John or Pheasant Tail) 18–24 inches below it.
- High-Sticking/Euro Nymphing: In the canyon stretches, the current is complex. Using a tight-line technique to keep your fly in the "seams" next to fast water is highly effective.
- Streamer Stripping: In the fall, swing streamers through the deep, dark pools for aggressive Browns.
💡 Pro Tips & Local Knowledge
- The "Two-Mile Rule": Most casual anglers stay within half a mile of the trailheads (First Box Canyon or Second Box Canyon). If you hike at least two miles in, the fish population becomes significantly more "willing" to take a fly.
- Watch the Walls: The Piedra is a limestone canyon. Often, fish will sit inches away from the rock walls waiting for beetles and ants to fall off the cliffs. Don't just fish the middle; fish the edges.
- Water Levels: Check the USGS gauges. If the Piedra is flowing above 500 CFS, it’s tough to wade. The "sweet spot" for wading is 150–350 CFS.
- Stealth Matters: Because the water is so clear in late summer and fall, wear natural colors (greens/browns) and avoid "lining" the fish with your fly line.
⚠️ Important Information
- Access:
- Upper Piedra: Accessible via Piedra Road (FS 631) north of Pagosa Springs.
- The Canyons: The Piedra River Trail offers access to the "First Box" and "Second Box" canyons. Be prepared for moderate hiking.
- Regulations: Much of the Piedra is Catch and Release only or has specific bag limits (check current Colorado CPW brochures). Many sections require the use of artificial flies and lures only.
- Safety: This is bear and lion country. Carry bear spray and be mindful of your surroundings. The canyon walls can be slippery and steep; wading boots with studs and a wading staff are highly recommended.
- Private Property: While much of the river is in the National Forest, there are pockets of private land (especially near the bridge on Hwy 160). Always respect "Posted" signs.
The Piedra is a river that demands respect but pays out in gold. Keep your flies floating high and your eyes on the shadows!
Bug Hatches & Matching Flies
| Hatch | Type | Peak months | Time of day | Hook sizes | Matching flies |
|---|---|---|---|---|---|
| Salmonfly Pteronarcys californica | stonefly | June | All Day | #4-8 | Pats Rubber Legs #4-8, Rogue River Stone #4-6, Chubby Chernobyl #6-8 |
| Green Drake Drunella grandis | mayfly | July | Afternoon/Evening | #10-12 | Colorado Green Drake #10-12, Quigley Cripple #12, Drake Hairwing Dun #10 |
| Golden Stonefly Hesperoperla pacifica | stonefly | June, July | Morning/Afternoon | #8-12 | Golden Stone Nymph #8-12, Yoshi's Golden Stone #10-12, 20-Incher Stone #10-14 |
| Blue Winged Olive Baetis | mayfly | April, May, September, October | Late Morning/Afternoon | #18-22 | RS2 #20-22, Parachute Adams #18-22, Pheasant Tail #18-20 |
| Pale Morning Dun Ephemerella | mayfly | July, August | Morning/Early Afternoon | #14-18 | PMD Sparkle Dun #16-18, Mercer's PMD Trigger #16, Split Case PMD #16-18 |
| Brachycentrus (Mother's Day Caddis) Brachycentrus occidentalis | caddis | May | All Day/Evening | #14-16 | Peacock Caddis #14-16, Graphic Caddis #14-16, LaFontaine's Deep Sparkle Pupa #14-16 |
| Cinnamon Sedge Hydropsyche | caddis | July, August, September | Evening | #14-18 | Elk Hair Caddis #14-18, X-Caddis #16, Z-Wing Caddis #14-16 |
| Midges Chironomidae | midge | January, February, March, December | Late Morning/Midday | #20-24 | Zebra Midge #20-22, Griffith's Gnat #20-24, Top Secret Midge #22 |
| Grasshoppers Acrididae | terrestrial | August, September | Late Morning/Afternoon | #8-12 | Morrish Hopper #10-12, Parachute Hopper #12, Amy's Ant #10-14 |