Wade · Best fit74/100
Wading is in play only where your chosen access has clear footing, legal entry, and no forced crossings.
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Fly fishing report · West
Cimarron River
A Colorado Cimarron report focused on Silver Jack and Big Cimarron Road access, USGS/RiverReports flows, small-stream tactics, and source checks.
Check flow & weatherToday's river scoreHigh source confidence
74
Good
Best option: Wade.
Wading is in play only where your chosen access has clear footing, legal entry, and no forced crossings.
Updated Jul 13, 11:17 PM UTCUsually refreshes about every 45 minutes
Recommended approachWade
Mode scores adjust the river-wide score for the risks of wading, bank fishing, or floating.
Bank / edgeCheck
This report does not describe this as a primary mode. Verify legal access, depth, launches, and retreat options before planning around it.
Float74/100
A float is in play where this report supports boat access and wind, releases, and shuttle logistics are manageable.
Confirm before you leave
Flow and weather right now.
Use the flow trend to confirm the score before you leave. Weather can change the safest and most productive fishing window.
Loading current flow and weather.
River strategy
Make sure you are looking at Colorado's Cimarron.
This report covers the Colorado Cimarron near Silver Jack Reservoir, not the New Mexico tailwater. The fishing is a remote high-country plan where road condition, snowmelt, and weather matter as much as hatch timing.
- Use the Cimarron near Cimarron gauge before planning wades or crossing small channels.
- Bring small dries, nymphs, and dry-dropper rigs for pocket and meadow water.
- Check USFS, NPS, and CPW sources for access context and current restrictions.
- Avoid copying New Mexico Cimarron reports into this Colorado plan.
Why this score moved
FlowUse caution
USGS shows 73 cfs with a falling about 16% over about 6 hours trend. same-date USGS history (1971-2025, 55 readings) puts normal around 151 cfs and the low-water marker near 90 cfs; today's flow is unusually low for the date. Low water can make fish spooky, warm, pressured, or concentrated; check temperature and handling risk.
SeasonHelps score
Summer: The main dry-fly and camping window when water remains cool.
WeatherHelps score
The NWS forecast is about 77F with Areas Of Smoke.
Public alertsHelps score
No active NWS alert was returned for this forecast point.
Fishing usefulnessHelps score
Skip the trip when you cannot confirm you are using Colorado-side access and rules, when road or weather conditions make the Silver Jack corridor reactive, or when high dirty water erases safe crossings and clear trout water.
Read the water
What changes the plan.
The Cimarron is best when roads are open, water is clear, and flows are cool enough for careful trout handling. Storms, runoff, wildfire restrictions, and low water can all make the day a scouting trip instead.
Low clear water
Use long approaches, small dries, and light droppers.
Good summer flow
Dry-droppers, attractor dries, and nymphs can cover pockets and meadow bends.
Runoff or release pulse
Avoid crossings and fish only protected edges if clarity and safety allow.
Storm or fire weather
Remote roads and access restrictions may be the deciding issue.
Field plan
Fish it with intention.
Best flows
Use the near-Cimarron trend as a planning anchor. Stable clear summer flow is the best fit for pocket-water and meadow presentations, while runoff surges or storm color should move you toward softer edges or another river entirely.
When to skip
Skip the trip when you cannot confirm you are using Colorado-side access and rules, when road or weather conditions make the Silver Jack corridor reactive, or when high dirty water erases safe crossings and clear trout water.
Local plan
Choose the public anchor first: Cimarron SWA for a clearer access framework, Silver Jack shoreline and nearby road water for a mixed scouting day, or a different drainage if the river still looks too pushy. Build the fly box around that choice instead of around the name alone.
Backup water
If the Cimarron is too high, too remote, or weather-blocked, pivot to the Taylor River for a more controlled tailwater plan or to the Uncompahgre when you want another western Colorado trout option with clearer reach definition.
Hatches & flies
Bring a flexible box.
TimingWhat to watchUseful flies
Early seasonMidges, BWOs, small stonesZebra midge, BWO emerger, pheasant tail, stonefly nymph
Reviewed pattern · report says “Zebra midge”Zebra MidgeLook for a very slim tapered thread body, evenly spaced contrasting wire rib, a small bead, and no tail or wing. The reviewed classic is black with silver wire and a silver bead. Red, olive, brown, glass-bead, jig-hook, resin-coated, or tailed forms must remain labeled variations rather than replacing the classic identity.See photos & how to fish it ↗
Reviewed family · report says “BWO emerger”Blue-Winged Olive PatternsBWO describes a hatch group, not one fly. Nymph, emerger, dry, cripple, and spinner profiles must stay separate because they occupy different parts of the water column.See family guide ↗+ 2 more reviewed guides in the Fly Box SummerCaddis, PMDs, yellow salliesElk hair caddis, PMD, yellow sally, hare's ear
Reviewed pattern · report says “Elk hair caddis”Elk Hair CaddisLook for a tented elk- or deer-hair wing, clipped hair head, dubbed body, rib, and hackle palmered along the body. The body color should be labeled because tiers often match different natural caddis colors.See photos & how to fish it ↗
Reviewed family · report says “PMD”Pale Morning Dun PatternsPMD names an insect group, not one fly. Pale nymphs, trailing-shuck emergers, upright or low-riding duns, cripples, and spent-wing spinners stay visibly separate.See family guide ↗+ 2 more reviewed guides in the Fly Box Late summerAnts, beetles, hoppers, caddisAnt, beetle, small hopper, caddis dry
Reviewed family · report says “Ant”Ant PatternsAnt patterns can be foam, fur-bodied, winged, or sunken. The narrow waist and paired body lobes matter more than one material recipe.See family guide ↗
Reviewed family · report says “beetle”Beetle PatternsBeetle flies range from simple foam shells to hair-bodied and sunken forms. A rounded back and compact profile distinguish the family from ants and hoppers.See family guide ↗+ 2 more reviewed guides in the Fly Box FallBWOs, midgesBWO dry, RS2, zebra midge, small bugger
Reviewed family · report says “BWO dry”Blue-Winged Olive PatternsBWO describes a hatch group, not one fly. Nymph, emerger, dry, cripple, and spinner profiles must stay separate because they occupy different parts of the water column.See family guide ↗
Reviewed pattern · report says “RS2”RS2Start with the beadless architecture: two dark-dun Microfibett tails separated behind a slim, tightly twisted and visibly segmented dubbed abdomen; a fuller thorax; and saddle-hackle web clipped into a short angled wing bud. Rim Chung's original-style form uses natural beaver dubbing and hackle web. CDC- or Antron-wing ties, beads, curved hooks, flash, and tailless Avatar-style flies must remain labeled variations.See photos & how to fish it ↗+ 2 more reviewed guides in the Fly Box 01
Confirm you are using Colorado Cimarron sources, not New Mexico reports.
02
Fish slowly through the first good pool before moving upstream.
03
Use dry-droppers to explore mixed pocket depths.
04
Protect soft banks and meadow edges.
05
Build an exit plan for storms, mud, or fire restrictions.
Access & responsibility
Know the entry. Know the exit.
Verify current CPW rules for the exact Colorado Cimarron reach you plan to fish, and do not confuse this page with the New Mexico Cimarron River.
Silver Jack Reservoir and shoreline area
USFS access around Silver Jack helps anchor the high-country plan.
Big Cimarron Road and forest access
Road condition and seasonal openings can decide whether the creek is realistic.
Curecanti and CPW context
Nearby public-land sources help keep this page tied to the correct Colorado drainage.
Transparent sources
Check the facts behind the plan.
Last material review: 2026-05-31
flowRiverReports: Cimarron River near CimarronflowUSGS monitoring location: Cimarron River near CimarronaccessGMUG National Forest Silver Jack Shoreline TrailaccessColorado Parks and Wildlife Cimarron SWAbackgroundNational Park Service Curecanti Cimarron arearegulationColorado fishing special regulationssafetyNational Weather Service forecast point near Silver Jack
Common questions
Before you leave.
Is this the New Mexico Cimarron River?+
No. This is the Colorado Cimarron near Silver Jack and Big Cimarron country.
Does it have a live flow source?+
Yes. This page uses RiverReports and USGS 09126000 near Cimarron for current flow context.
What flies should I carry?+
Small dries, dry-droppers, caddis, PMDs, BWOs, midges, and a few small streamers cover most useful windows.
What is the main risk?+
Access uncertainty. Remote roads, snow, storms, and fire restrictions can matter more than hatch timing.