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Waterton Canyon on the South Platte River isn’t just another spot on the map—it’s a rite of passage for fly fishing enthusiasts. If you’re looking to sharpen your skills, this is the place. The canyon’s reputation as one of the most technical fisheries around isn’t just for show; it’s earned.
South Platte River Fishing Report – Waterton Canyon – February 2025
Listen to the Podcast!
March brings early signs of spring to Waterton Canyon, but don’t get too excited—winter isn’t quite done with us yet. The South Platte is still running cold, and while trout are starting to wake up from their sluggish winter state, they’re not exactly sprinting for your flies just yet. The flows remain low, so stealth and patience are the name of the game.
The biggest change this month is the increase in bug activity. Midges still dominate, but Baetis (Blue Wing Olives) are making an appearance on cloudy afternoons. The dry fly bite remains sporadic, but if you’re in the right place at the right time, you might catch a few noses breaking the surface. Nymphing remains the most consistent approach, with small midges, Baetis, and scuds producing. Streamer fishing? If you’re feeling bold, low-and-slow presentations might tempt an aggressive brown.
Conditions Summary
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- Flow Rate: 50-75 CFS (Low but steady)
- Water Temperature: 38-42°F
- Clarity: Crystal clear with occasional runoff spikes on warm afternoons
- Best Times: Late morning to mid-afternoon
- Star Rating: ⭐⭐⭐ (3/5 – Still cold, but improving with pre-runoff bug activity)
River Flow Chart
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Waterton Canyon Hatch Chart
| Month | Primary Hatches | Effective Patterns |
|---|---|---|
| February | Midges, Baetis, Scuds | Zebra Midge (#20-24), RS2 (#20-22), Olive Scud (#16-18) |
| March | Midges, Baetis (BWO), Small Stones | Black Beauty (#20-24), Blue Wing Olive (#18-22), Pat’s Rubber Legs (#12-14) |
| April | Baetis, Caddis, Midges | Pheasant Tail (#16-20), Elk Hair Caddis (#16-18), RS2 (#20-22) |
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Top Flies for the Week
- Dry Fly: Blue Wing Olive (#18-22) – Best fished on cloudy afternoons when Baetis start emerging.
- Nymph: RS2 (#20-22) – Perfect for slow, deep drifts where trout are holding.
- Streamer: Mini Leech (#10-12) – Dead-drift or slow-strip through deeper pools for a shot at an aggressive brown.
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Fly Fishing Waterton Canyon in March
Seasonal Tip
Warmer days bring better fishing, but early mornings are still slow. Fish the deepest, slowest runs until water temps start rising in the afternoon.
Dry Fly
Watch for Baetis hatches on cloudy days. If you see rising trout, switch to a BWO dry fly or emerger pattern.
Nymphing
This is still the most reliable approach—use a two-fly setup with a Baetis nymph and a midge to maximize your chances.
Streamer Fishing
Trout are starting to show more aggression—try a slowly twitched leech or small sculpin pattern in deeper water.
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Access Points
Waterton Canyon Trailhead
- Description: Easy access, well-maintained trail, and multiple deep runs.
- Why Fish Here: Best shot at winter-holding fish near Denver.
- Locals’ Rating: ⭐⭐⭐
Mid-Canyon Pools
- Description: Slower, deeper water that holds fish during colder months.
- Why Fish Here: Great for nymphing and occasional rising trout.
- Locals’ Rating: ⭐⭐⭐⭐
Upper Canyon Near Strontia Springs
- Description: More remote, with deeper pools and great structure.
- Why Fish Here: Fewer anglers and bigger fish willing to eat a well-placed fly.
- Locals’ Rating: ⭐⭐⭐⭐⭐
Local Regulations and Notes on Landowner Rights
- Artificial flies and lures only—no bait fishing.
- Watch for private property boundaries near the lower section.
- Hiking access only—no bikes on weekends.
- Catch-and-release encouraged to preserve wild trout populations.
March is one of the best pre-runoff months to fish Waterton Canyon—with Baetis starting to hatch and trout getting more active, the fishing is only going to improve from here. Get out there before runoff muddies things up!
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