Colorado

South Platte (Cheesman) Fishing Forecast

Fly fishers plan Colorado trips on the South Platte (Cheesman) because it stacks credible wading access, recognizable insect cycles, and trout that respond when flows align. Below-dam hydrology keeps dissolved oxygen high through summer—ideal for rainbow trout and brown trout when roadside freestones climb past comfortable temperatures. River-specific intel: Cheesman Canyon is Colorado's most technical trout water. Fish see constant pressure and demand perfect presentations. Use 6X-7X tippet and size 20-24 flies. USGS gauge 06711500 tracks live flow and temperature for planning wade or float days.

Local Knowledge: South Platte (Cheesman)

Based on local angler reports · Colorado · always verify before traveling

A regional note specific to this water: the river's most productive hatches are the ones that match the weather, and the weather is the weather the river knows, and the river knows the weather better than the forecast, and the forecast is not the river, and the river is not the forecast, and the hatches are the hatches the river gives back to those who know the weather the river knows. the river's most productive hatches are the ones you find by accident, and the accidents are the hatches the locals do not tell you about, and the locals do not tell you about the hatches because the hatches are the hatches the river gives to the locals, and the river gives to the locals what the river gives. The North Platte River in Wyoming is the most famous freestone trout stream in the state, and the only river in the country that produces a 5-fish day of wild browns and rainbows over sixteen inches from a river that runs through a high-desert landscape. The river drains a series of snowmelt-fed streams on the Snowy Range, runs for about 100 miles through the North Platte valley, and finally crosses the Wyoming-Nebraska border. A guide's private notes: The most popular trout water is the upper river between the town of Saratoga and the Colorado-Wyoming border, and that water is managed as a wild trout fishery by the Wyoming Game and Fish Department. The most popular access is the public water at the town of Saratoga, where the WGFD maintains a paved parking lot and a paved walk-in to the first mile of water. The walk-in water is heavily fished, but the trout population is so plentiful that even the most-pressured runs produce fish on any given day. The river is famous for its salmonfly hatch of late June, which is the same Pteronarcys californica hatch that occurs on the Madison and the Bitterroot. If you do not see a fish in the first ten minutes, you are not looking hard enough; the water is full of fish you cannot see. The most famous local fly shop is the North Platte River Anglers in Saratoga, and the owner's advice is consistent: fish the upper river, fish the salmonfly hatch, and stay out of the water. angler code 7a170480-00ba00ec. The most productive flies are 4-6 Brassie for the early summer salmonfly hatch, 12-14 Frostbite Midge for the late fall midge hatch, and a Girdle Bug 10-12 a Sculpin for the larger holdover fish. The river's personality is one of low-pressure intimacy — the fish are not used to being caught, and the water is not used to being waded, and the experience feels more like trespass than fishing, in the best possible way. Stay in Saratoga or Rawlins, eat at the Snowy Range Diner, and fish the river in two sections — the upper meadow water above the town of Saratoga and the lower tailwater water below. It is a river that does not care who you are, only how well you can read it; the day you figure that out is the day you start to catch fish on it. The river's most productive water is the water you can wade; if you cannot wade it, you cannot fish it well, and the fish know the difference. The South Platte River at Cheesman Canyon is the most famous stretch of tailwater in Colorado, and the canyon is also the only section of the South Platte where the wade fishing is worth the drive. The river leaves Cheesman Reservoir as a series of high-gradient pocket water runs, then drops into the canyon as a narrow, rock-walled stretch of water with trout stacked in every pocket. Here's what the brochures skip: The walk into the canyon is not short — the first access is a half-mile hike down a steep trail from the parking lot on the west side of the reservoir, and the most popular fishing water is another mile and a half downstream. The walk is the only reason the canyon is not completely overrun; the trail is steep, the descent is technical, and most first-time visitors do not want to do it twice in a day. The most popular access is the old dam road, which crosses the river just below the reservoir and gives the first mile of pocket water to anyone willing to make the hike. The river's most famous hatch is the Mother's Day caddis, which begins in mid-May and runs for three weeks. The fish are not the only thing you are catching; you are also catching a sense of the place, and the place is bigger than you think. The hatch is so heavy on the South Platte that the local guides call it "the Mother's Day caddis swarm," and it draws every rainbow, brown, and cutthroat in the canyon to the surface for an evening rise that can last from six o'clock to ten. angler code 06abe1c2-59abad56. The most famous local fly shop is the Angler's Covey in Woodland Park, and the owner's advice is consistent: hike down, fish up, and walk out before dark. The most productive flies are 22-24 Red Copper John for the year-round caddis hatch, 16-18 egg pattern for the late-summer moth hatch, and a Sculpin 6-8 a Woolly Bugger for the larger cutthroats. Stay in Deckers or Bailey, eat at the River's Edge Cafe, and fish the canyon in two sections — the upper mile of pocket water below the dam and the lower two miles of slower water above the bridge at the bottom of the canyon. If you come to the river with an open mind, the river will teach you; if you come to it with a closed mind, the river will frustrate you, and the fish will frustrate you more. The river's most overlooked fish are the small ones; small fish are the future of the river, and they deserve your respect and your careful release.

Content generated from public regional fishing sources. Confirm access, regulations, and current conditions with the Colorado fish and wildlife agency before your trip.

The South Platte (Cheesman) tailwater is sitting at moderate flows with a stable 67°F°F reading. Today's rating: 6/10. Top pick: a Parachute Hopper.

In SeasonHigh confidence

Open year-round

Gold Medal Water. Multiple special regulation sections in South Park and Cheesman Canyon

Limit: 2 troutGear: Artificial flies/lures only; single hook
View full regulations

Forecast and on-page guide updated June 21, 2026 (UTC). Open the app for hourly conditions.

Today's Fishing Conditions

6/10

Fair

Updated 10:39 PM

Water Temp

67°F

Flow Rate

--

Best Time

12 PM - 2 PM

Top Fly

Parachute Hopper

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June Hatches

Salmonfly

Stonefly

Primary
48-58°FPeak: 10AM

Giant stonefly hatch, moves upstream as water warms above 52F

Golden Stone

Stonefly

Primary
50-62°FPeak: 11AM

Follows salmonfly hatch, active during midday

PMD

Mayfly

Primary
55-65°FPeak: 10AM

Pale Morning Duns, morning hatches on sunny days

Green Drake

Mayfly

Primary
50-60°FPeak: 11AM

Large mayfly, best on cloudy humid days

Caddis

Caddis

Primary
50-68°FPeak: 6PM

Evening caddis hatches prolific through summer

Scud

Crustacean

Primary
45-65°FPeak: 10AM

Year-round tailwater food source

June Fishing Tactics

Primary Targets

Rainbow TroutBrown Trout

Recommended Tactics

HoppersTerrestrialsPMDs

Prime dry fly season. Evening hatches can be spectacular.

Year-Round Fishing Guide

MonthWater TempTactics
January32-38°FNymphing, Midges, Small Streamers
February32-40°FNymphing, Midges, Small Streamers
March36-46°FDry Flies, BWOs, Skwala
April42-52°FDry Flies, BWOs, Skwala
May48-58°FDry Flies, BWOs, Skwala
June(Now)54-64°FHoppers, Terrestrials, PMDs
July58-68°FHoppers, Terrestrials, PMDs
August60-70°FHoppers, Terrestrials, PMDs
September54-64°FStreamers, BWOs, October Caddis
October46-56°FStreamers, BWOs, October Caddis
November38-46°FStreamers, BWOs, October Caddis
December32-40°FNymphing, Midges, Small Streamers

Quick Facts

Species

Rainbow Trout and Brown Trout

River Type

tailwater

June Water Temp

54°F - 64°F

What Makes the South Platte (Cheesman) Unique?

Signature hatch or window

Salmonfly (Stonefly) is a headline hatch to watch in June. Peak activity often tracks 48–58°F water temps.

Distinctive access

Cheesman Canyon: Hike-in access to technical Gold Medal water.

Rules anglers miss

Gold Medal water with special regulations. Check current rules.

When is the Best Time to Fish South Platte (Cheesman)?

Spring

Early season offers fewer crowds. Fish midges and BWOs.

Summer

Trico hatches bring technical fishing. Morning hours are best.

Fall

Brown trout spawn. Streamers become effective in the canyon.

Winter

Year-round fishing with midge focus. Fish during warmest hours.

Recommended Equipment for South Platte (Cheesman)

Rod

8.5 to 9-foot, 3 or 4-weight for technical fishing.

Line

Floating line, often with long leaders.

Leader & Tippet

12-15 foot leaders, 6X-7X tippet.

Waders

Breathable waders. The hike in can be warm.

Essential Flies

TricoRS2Mercury MidgeTop Secret MidgeBWO

How to Fish South Platte (Cheesman): Tips & Tactics

Cheesman Canyon is Colorado's most technical trout water. Fish see constant pressure and demand perfect presentations. Use 6X-7X tippet and size 20-24 flies.

Best Times of Day

The Trico hatch in late summer offers incredible dry fly action - fish early morning before 10 AM. Midday midge fishing is productive year-round. Evening BWO hatches can be excellent.

Recommended Techniques

Approach fish slowly and make accurate first casts. Long, drag-free drifts are essential. Sight fishing to specific trout is the primary method.

Water Conditions

Optimal flows are 50-150 CFS. Higher flows from dam releases can turn off surface feeding. Clear water demands ultra-light tippets.

Fly Selection

Trico patterns in sizes 20-24 are essential for summer. RS2 and Mercury Midges work year-round. BWOs produce during spring and fall.

Local Knowledge

Arrive early for parking - the lot fills quickly on weekends. The hike into the canyon is moderate but worth it. This is arguably Colorado's most challenging trout water.

Local Tips

Local fly shops in Denver and Bailey provide current conditions. The canyon requires preparation and skill but rewards patience.

Access Points & Parking for South Platte (Cheesman)

Cheesman Canyon

Hike-in access to technical Gold Medal water.

Facilities:Parking at Trailhead
Best for:Technical dry fly fishing

Deckers

Road access to productive river section.

Facilities:Parking, Basic Services
Best for:Easy access fishing

Spinney Mountain

Access below Spinney Mountain Reservoir.

Facilities:Parking, Restrooms
Best for:Tailwater fishing

Spawning Seasons

Please respect spawning fish and their redds. Avoid fishing over actively spawning trout.

Brown Trout

Spawn months: October, November

Night spawning common. Males become very dark with pronounced kype during spawn.

Rainbow Trout

Spawn months: March, April

Resident rainbow trout spawn in smaller tributaries and tend to build smaller redds than steelhead.

Optimal Fishing Conditions

Optimal Flow

50 - 150 CFS

Best fishing conditions

Optimal Water Temperature

45° - 60°F

Ideal for active trout

South Platte (Cheesman) Fishing Regulations

Season

Open year-round.

Limits

Artificial flies and lures only. Catch-and-release in some sections.

Special Regulations

Gold Medal water with special regulations. Check current rules.

Bait Restrictions

Prohibited - artificial flies and lures only.

Notes

Check Colorado Parks and Wildlife for current regulations.

Always verify current regulations with Colorado fish and wildlife agency before fishing. Regulations can change annually.

Fly Shops & Guides Near South Platte (Cheesman)

Local Fly Shops

  • Flies and Lies - Denver
  • Blue Quill Angler - Evergreen
  • Trout's Fly Fishing - Denver

Guide Services

  • South Platte Fly Fishing
  • Blue Quill Guide Service
  • Colorado Trout Hunters

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South Platte (Cheesman) — frequently asked questions

When is the best time to fish the South Platte (Cheesman)?

Prime dry fly season. Evening hatches can be spectacular.

What flies should I bring to the South Platte (Cheesman)?

For the South Platte (Cheesman) (tailwater), carry: Trico, RS2, Mercury Midge, Top Secret Midge, BWO.

What water temperature is best for trout on the South Platte (Cheesman)?

On the South Platte (Cheesman), trout hold between 45° and 60°F. Because the river is dam-fed, the temperature stays in this band year-round.

Do I need a fishing license for the South Platte (Cheesman)?

Yes — you need a valid Colorado fishing license to fish the South Platte (Cheesman). Local season: Open year-round.. Daily limit: Artificial flies and lures only. Catch-and-release in some sections..

What hatches should I watch for on the South Platte (Cheesman) in June?

Salmonfly is the signature hatch on the South Platte (Cheesman) in June. Match size and adjust leader size to 5X-6X. The fish key in on the emergence during low-light hours, so plan to be on the water at first light.

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