Fishing the High Country: The Best Places to Fish in Colorado.
In Colorado, fishing is an uphill climb — literally. From the crystal-clear tailwaters of the Fryingpan River to the massive trout in Spinney Mountain Reservoir, Colorado offers some of the best freshwater angling in the USA. The water is colder, the fish are smarter, and the weather can change in a heartbeat. We've mapped out the Gold Medal spots and high-country secrets to help you navigate the Rockies like a local.
Colorado Fishing — By Water Type
Colorado isn't one fishery — it's three completely different experiences depending on elevation and water type. The DU Tech Team breaks it down so you fish the right water with the right gear.
Gold Medal Rivers
The Pro's Choice — CPW Designated
Colorado's CPW (Colorado Parks & Wildlife) designates certain river stretches as "Gold Medal" waters — meaning they produce the highest quality trout fishing in the state. These sections hold exceptional numbers of large trout, supported by prolific insect hatches. The Fryingpan, South Platte, Arkansas, and Roaring Fork are the crown jewels. Expect technical fishing, educated fish, and unforgettable scenery.
The Fryingpan River below Ruedi Reservoir is arguably the finest tailwater fishery in the Rocky Mountain West. Consistent cold flows year-round produce absurdly large Rainbow and Brown Trout — 20"+ fish are common. The South Platte's Cheesman Canyon holds some of the most pressured — and most rewarding — trout in the country.
- Fryingpan River — Ruedi Reservoir Tailwater (Rainbows, Browns)
- South Platte — Cheesman Canyon (Technical Dry-Fly)
- Arkansas River — Salida to Cañon City (Tailwater Browns)
- Roaring Fork River — Basalt to Carbondale (Wild Rainbows)
- Upper Colorado River — Parshall to Kremmling (Large Browns)
- Taylor River — Almont (Trophy Tailwater)
Year-round on tailwaters (below reservoirs). Freestone rivers best July–October after runoff clears. Avoid May–June runoff on non-tailwater sections.
The Fryingpan at Basalt, CO in October is as good as it gets in America. The tailwater keeps temps in the mid-40s°F year-round — fish feed hard through winter. Small olive midges (#22–24) on 6X tippet are the ticket. Go lighter than you think you need to. Those fish have seen every fly pattern known to man.
Gold Medal sections are mostly on public land or have designated public access points. Look for CPW "Public Fishing" signs along river roads. The Fryingpan Road (CR 104) from Basalt follows the entire fishable tailwater with multiple pull-off access points.
Ultralight Spinning Rod & Reel Combo
Light spinning combo or 4–5 wt fly rod, 4 lb–6 lb fluorocarbon tippet
Mid-May through late June, snowmelt turns most freestone rivers brown and blown-out. Tailwaters (below dams) fish well year-round — Fryingpan, Arkansas, Taylor. Stick to those during runoff season.
Gear Changes with Every 1,000 Feet
This is the Colorado secret most out-of-state anglers miss. Your reservoir bass setup will spook every trout in the Fryingpan. Match your gear to your elevation — every time.
| Elevation | Target Fish | Water Type | Recommended Gear | |
|---|---|---|---|---|
5,000 5,000 – 6,000 ft Easy Access | Bass / Walleye / Pike / Catfish | Large Reservoirs & Urban Lakes | Medium Spinning or Baitcaster 6'6"–7' | View on Amazon |
7,000 7,000 – 9,000 ft Gold Medal Zone | Brown Trout / Rainbow Trout | Major Rivers, Tailwaters & Freestone Streams | Light Spinning 6'–6'6" ML or 4–5 wt Fly Rod | View on Amazon |
10,000 10,000 ft+ High Alpine — 10k+ | Cutthroat Trout / Brook Trout | Alpine Lakes, Cirque Basins & Headwater Streams | Ultralight 5'–6' or Telescopic Pack Rod (KastKing Blackhawk II) | View on Amazon |
7,000 – 9,000 ft — Mountain Rivers & Gold Medal Tailwaters
Light Spinning 6'–6'6" ML or 4–5 wt Fly Rod
1000–2500 series spinning or fly reel with 4 wt line
4–8 lb fluorocarbon tippet (light is essential — these fish are educated)
San Juan Worm, RS2 Midge, Pheasant Tail Nymph, Panther Martin #4 gold spinner
Fryingpan River, Arkansas River, South Platte — Cheesman Canyon
Drop to 4 lb or even 2 lb fluorocarbon in clear Gold Medal water. Line visibility costs you fish.
Colorado Fishing Calendar — When to Go
Timing is everything in Colorado. The runoff in May will ruin your trip. September will blow your mind. Here's the month-by-month breakdown the DU Tech Team uses to plan every Rocky Mountain trip.
Jul – Aug — Prime Summer
Conditions: Perfect Flows, Warm Days
All Waters Open — Peak Season
Pale Morning Dun (#14–18), Trico (#20–24), Caddis evening hatches, terrestrials (ants, beetles, hoppers)
Dry-fly on PMD hatches (10 AM–noon), hopper-dropper afternoons, evening Caddis spinner falls
Perfect Flows, Warm Days
Mid-July hopper fishing is the most FUN you'll have in Colorado. Big foam hopper pattern on 3X tippet, land it hard near the bank — Brown Trout smash it. DU Tech formula: Chubby Chernobyl hopper with a #16 bead-head dropper trailing 18" behind.
Gear You'll Need
in Colorado
High altitude means thinner air, stronger UV, and colder water than you expect. The DU Tech Team's Colorado-specific picks — built for mountain conditions and Gold Medal rivers.
DU Tech High-Altitude Warning
At 10,000+ feet, UV rays are 25–50% more intense than at sea level. A UPF 50+ hat isn't optional in Colorado — it's essential, even on overcast days.
Fishing Hats (UPF 50+)
High-altitude UV is brutal — wide-brim boonies are non-negotiable in Colorado.
Trout Lures
Spinners, spoons, and streamers for Gold Medal rivers and alpine lakes.
Fishing Lines
Light fluorocarbon for clear mountain water — trout can see everything.
Fishing Backpacks
Hike-in packs for alpine lake access — waterproof and load-bearing.
Handheld GPS
Navigate backcountry trails to remote alpine lakes without cell service.
Fishing Waders
Neoprene and breathable waders for cold Colorado rivers and alpine streams.
Altitude and Your Gear.
The Rockies will punish the unprepared. Here's the DU Tech Mountain Kit — non-negotiable items for every Colorado fishing trip above 7,000 ft.
At 10,000 ft, UV radiation is 25% stronger than at sea level. We have seen guys burned raw in 90 minutes on a bright September day on the Fryingpan. Pack SPF 50 face sunscreen AND a UPF 50 shirt. Non-negotiable.
Colorado's dry air pulls moisture from your body constantly at altitude. You will not feel thirsty until you are already dehydrated. Drink at least 3 liters of water on any full-day fishing trip above 8,000 ft. A water filter (Sawyer Squeeze) lets you drink directly from mountain streams safely.
Colorado summer afternoons produce violent lightning storms almost daily in July–August above treeline. Graphite rods are essentially lightning rods. If you hear thunder, reel in and move to lower elevation IMMEDIATELY. No fish is worth a lightning strike on an exposed ridge.
Morning temps at 9,000 ft in September can hit 28°F even when Denver is forecasting 70°F. A fleece layer and a packable rain shell weigh almost nothing and have saved more than a few DU Tech trips. Always check the NOAA mountain forecast — not the Denver city forecast.
"At 9,000 feet, the sun is brutal. We've seen more trips ruined by sunburn and dehydration than by empty hooks. Always pack a 'Mountain Kit.' Also, trout in Colorado have great eyesight. If the water is clear, we drop down to 4 lb or even 2 lb test — it's the only way to fool those Gold Medal beauties."
The DU Tech Team's top pick for Colorado alpine lake hike-ins. Collapses to 18 inches. Full review.
Hiking into RMNP or the Maroon Bells requires the right pack. Our full guide covers hiking-first designs.
Colorado trout on light 2–4 lb line requires perfect knots. A bad knot at 12,000 ft means a lost fish.
Colorado mountain rivers are cold. Proper wading pants and waders keep you fishing longer and safer.
Everyone 16+ needs a CPW fishing license. Available online at cpw.state.co.us or at any tackle shop. Annual license ~$36 for residents, ~$96 for non-residents.