Park County is one of the great trout fishing destinations in the American West, and most anglers outside of Colorado have never heard of it. The South Platte River system flows through the entire county, feeding a network of tailwaters, freestone streams, and reservoirs that hold some of the largest trout in the state. The landscape is wide-open grassland ringed by 14,000-foot peaks, and on a Tuesday in October, you might fish all day without seeing another person.
This is the local's guide. No fly shop sales pitches. Just where to go, what to expect, and how to not waste your time.
The Dream Stream
The stretch of the South Platte between Spinney Mountain Reservoir and Elevenmile Reservoir is the most famous piece of water in Park County and arguably in Colorado. It's Gold Medal water — a designation from Colorado Parks and Wildlife meaning it sustains a trout population of at least 60 pounds per acre, including 12 or more quality fish (14 inches or larger) per acre.
In practice, this means you'll see big fish. Rainbows and browns averaging 14-18 inches, with plenty of 20-inch fish and the occasional genuine trophy pushing into the mid-20s. The river meanders through open meadow with virtually no tree cover, which means you can see the fish — and the fish can see you. This is technical fishing. Light tippet (6X-7X), small flies (size 18-24 midges and BWOs), and a careful approach are the price of admission.
Best times: March through May for the midge and BWO season (dress warm — it's 9,000 feet and exposed to wind). September through November for fall browns and cooler, less-crowded conditions. Summer can be excellent but the banks get busy on weekends.
Regulations: Flies and lures only. Special bag and size limits apply — check the current Colorado fishing regulations before going. A Colorado fishing license is required.
Elevenmile Canyon
Below Elevenmile Dam, the South Platte cuts through a granite canyon that offers dramatically different fishing than the meadow sections upstream. This is pocket water — riffles, runs, boulders, and plunge pools in a narrow, shaded canyon. The trout here are smaller on average than the Dream Stream fish but more willing to eat a well-presented dry fly.
Access is via a gravel road that follows the river for several miles. There's a day-use fee ($8-10 per vehicle). The canyon is less crowded than the Dream Stream, especially on weekdays, and the scenery — steep granite walls with pine and aspen — is gorgeous. This is excellent water for anglers who prefer moving upstream with a dry-dropper rig rather than sight-nymphing in meadow water.
Best times: June through October. The canyon runs can be productive year-round, but summer and fall offer the widest variety of hatches — caddis in June-July, terrestrials in August, BWOs in September-October.
Tarryall Creek
Tarryall Creek is Park County's small-stream secret. It flows east out of the Tarryall Mountains through a beautiful, sparsely populated valley before eventually joining the South Platte. The creek holds healthy populations of brown and brook trout in the 8-12 inch range — nothing that'll make the record books, but the fishing is fun, the setting is peaceful, and the solitude is genuine.
This is classic small-stream dry fly fishing. Short casts, careful wading, attractor patterns like Royal Wulffs and Elk Hair Caddis. The brookies are often willing and the browns require more finesse. Much of the creek flows through public land (Pike National Forest) and access is straightforward from the Tarryall Road.
Spinney Mountain Reservoir
Spinney is a shallow, wind-exposed reservoir at 8,700 feet that grows enormous trout. Northern pike over 40 inches, rainbow and brown trout over 10 pounds, and carp that fight like smallmouth bass are all realistic targets. The reservoir is managed for trophy fish with special regulations — check the current rules carefully.
This is not delicate fly fishing. Spinney is a lake with big wind, big fish, and big gear. Float tubes and pontoon boats are the preferred method. Streamers, woolly buggers, and leech patterns work for the trout. Large articulated flies or conventional gear for the pike. Winter ice fishing is popular when conditions allow.
Antero Reservoir
Antero sits higher than Spinney (8,940 feet) in the heart of the South Park basin with unobstructed views of the Mosquito Range. It's a productive still water fishery with rainbow and brown trout, plus some cutbows. The lake is shallower than Spinney and can be excellent in spring and fall when trout are cruising the flats. Sight fishing to cruising trout on Antero's sandy flats is a uniquely Colorado experience.
Gear Essentials for Park County
Dream Stream / meadow sections: 9-foot 5-weight rod, 9-12 foot leaders tapered to 6X-7X, midge patterns in sizes 18-24 (zebra midges, RS2s, mercury midges), BWO patterns (Sparkle Duns, Comparaduns), emerger patterns. A good pair of polarized sunglasses is essential for sight fishing.
Elevenmile Canyon: 8.5-9 foot 4 or 5-weight, shorter leaders (7.5-9 feet to 5X), dry-dropper rigs with Elk Hair Caddis or Stimulators on top and beadhead nymphs below. Wading boots with felt or rubber soles.
Reservoirs: 6 or 7-weight rod for casting streamers, sink-tip line, large woolly buggers and leech patterns. Float tube or pontoon boat recommended. Dress for wind — the South Park basin is notoriously windy.
Fly Shops & Guides
South Platte Fly Shop (Fairplay): The local authority on Dream Stream and canyon conditions. Up-to-date reports, quality flies, and knowledgeable staff. Stop here before hitting the water.
Mountain Angler (Breckenridge): Just over Hoosier Pass from Park County. Excellent shop with guided trips on the South Platte system and the Blue River.
If you're new to the area, a half-day guided trip is money well spent. The Dream Stream in particular rewards local knowledge — knowing which bends are holding fish, which flies are working today, and how to approach the meadow water without spooking everything in a 50-yard radius will save you hours of frustration.
Frequently Asked Questions
What is the Dream Stream in Colorado?
The Dream Stream is a section of the South Platte River between Spinney Mountain Reservoir and Eleven Mile Reservoir in Park County, Colorado. It's one of the most famous trout fisheries in the state, known for large rainbow and brown trout, clear water, and sight-fishing opportunities. It's located about 90 minutes from Denver near Hartsel.
What is the best time to fish the Dream Stream?
The best time to fish the Dream Stream is September through November (fall) and March through May (pre-runoff spring). Fall fishing is the best of the year with aggressive fish feeding before winter. Spring pre-runoff offers stable flows and active fish. Avoid mid-June through mid-July when snowmelt runoff makes the river unfishable.
What fish are in the South Platte River?
The South Platte River in Park County holds rainbow trout, brown trout, cutthroat trout, and northern pike. The Dream Stream section is known for trophy-sized rainbows and browns. Spinney Mountain and Eleven Mile reservoirs on either end also hold pike and kokanee salmon.
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