South Platte River CO fishing forecast
South Platte River CO is a freshwater fishing spot in Colorado, United States. Anglers here target Rainbow Trout, Brown Trout, Cutthroat Trout. The most productive months are typically March, April, May, June, July, August, September, October, November.
Current conditions
| Sea surface temp | 21.7 °C |
|---|---|
| Wind | 15 km/h from NE |
| Pressure | 1015 hPa |
| Cloud cover | 73% |
The water is running true to season — within a few tenths of the July average of 21.7 °C for this location. The water is mixed to about 26.7 m, with the thermocline below that.
Last updated Jul 28, 2026 (UTC). Conditions refresh through the day.
What the score means at South Platte River CO
South Platte River CO currently scores 78 out of 100 (Hot). Water temperature is 21.7 °C. 6 forecast signals are active in this score. As a rough guide, a score above ~65 reflects conditions experienced anglers would typically fish; below ~45, consider waiting for a better window or targeting different species. The score blends live weather and ocean signals and can change through the day.
Bite windows
Best months for South Platte River CO:
About this spot
Rivers are flow-driven. Fish the seams, eddies, and structure where current breaks, where fish hold to conserve energy and ambush bait.
What you can catch
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Oncorhynchus mykiss
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Salmo trutta
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Oncorhynchus clarkii
Best months by species at South Platte River CO
| Rainbow TroutOncorhynchus mykiss | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Brown TroutSalmo trutta | ||||||||||||
| Cutthroat TroutOncorhynchus clarkii |
Months reflect typical catchability by species at this latitude; local seasons and closures apply.
Local regulations
| Species | Bag limit | Min size | Open season |
|---|---|---|---|
| Rainbow TroutStatewide Bag & Possession Limits | 4/day, 8 in possession | — | Jan 1 – Dec 31 |
| The 4-fish limit is an AGGREGATE across trout, Arctic char, grayling, salmon and mountain whitefish (kokanee excepted) — not 4 of each. Many Colorado waters are stricter: on the Fryingpan River below Ruedi Dam and on the Gunnison River above the US 50 bridge, all rainbow trout must be released immediately, and fishing is by artificial flies and lures only. | |||
| Brown TroutStatewide Bag & Possession Limits | 4/day, 8 in possession | — | Jan 1 – Dec 31 |
| The 4-fish limit is an AGGREGATE across trout, Arctic char, grayling, salmon and mountain whitefish (kokanee excepted). Water-specific rules are stricter at several Colorado waters: on the Gunnison River between the East/Taylor confluence and the US 50 bridge the brown trout limit is two fish at a 16-inch minimum; on the Blue River below Coyne Valley Road all brown trout over 14 inches must be released and fishing is closed 15 September – 1 December. | |||
| Cutthroat TroutStatewide Bag & Possession Limits | 4/day, 8 in possession | — | Jan 1 – Dec 31 |
| The 4-fish limit is an AGGREGATE across trout, Arctic char, grayling, salmon and mountain whitefish (kokanee excepted). GREENBACK CUTTHROAT TROUT MAY NOT BE TAKEN AT ALL — the brochure lists it among the threatened, endangered and nongame species that must be returned to the water immediately. Waters designated Cutthroat Conservation and Recreation waters are artificial flies and lures only, with all cutthroat released immediately. | |||
Licensing:
- freshwater-recreational — residents Resident adult annual (18–63) $44.87. Senior annual (64+) $12.96. Youth 16–17 $12.96. A 2026 Habitat Stamp ($12.76) is also required for anyone aged 18–64., non-residents Nonresident annual (16+) $124.01. Five-day $41.04. One-day $21.90.
FishRadar regulations are summaries for informational purposes only. The figures here are Colorado STATEWIDE limits from the 2026 Colorado Fishing brochure; a great many Colorado waters carry more restrictive rules under Chapter W-1 Article II, including several of the rivers and reservoirs on this site. Always check the water-specific entry in the current brochure (Special Regulations: Fishing Waters) before you fish.
Check South Platte River CO before you go
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Nearby spots
Explore 5 more fishing spots within 150 km of South Platte River CO.
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Arkansas River Colorado
Blue River CO
Arkansas River CO
Fryingpan River CO
Horsetooth Reservoir CO
Frequently asked questions
What fish can you catch at South Platte River CO?
Anglers at South Platte River CO target Rainbow Trout, Brown Trout and Cutthroat Trout.
When is the best time to fish South Platte River CO?
The most productive months at South Platte River CO are typically March, April, May, June, July, August, September, October, November.
What is the fishing forecast for South Platte River CO right now?
South Platte River CO currently scores 78 out of 100, based on live ocean and weather conditions — see the full breakdown on this page.
Do you need a licence to fish South Platte River CO?
Fishing at South Platte River CO follows the local rules for Colorado, United States. Bag limits, size limits, seasons and licence requirements are summarised in the Local regulations section above, with a link to the official authority.
Fishing guides for this spot
- How to Catch Rainbow Trout in Stocked Lakes and PondsHow to Catch TroutBest Time of Day to Fish
Scores and conditions are forecasts for guidance only and can change rapidly. Always check local rules and current conditions, follow all fishing regulations, and prioritise your safety on the water.