Date: April 1, 2026

The Bottom Line: The "winter grind" is in the rearview mirror. While the water is still cold (~40°F), increasing daylight and slightly rising temperatures have triggered some bug activity. We are seeing some fish move out of the deepest winter holes and into the seams and transition zones as they look for food. The "game of patience" has turned into a "game of timing"—hit the river during the warmest part of the day for the best action. If you're floating, continue to stay vigilant and watch for gravel beds, boulders, and other structure.

The Move: The deep buckets are still holding fish, but the shallow riffles and tail-outs are where the diners are heading during the warm feeding windows. If the sun is out, look for fish cruising typical feeding lanes.

Water Level and Clarity: Low, slow, and the water is clear. The clarity will change once the snow melts this weekend.

Water Temps: Anytime we get ice and snow melting it significantly drops the temperature of the water.

Wading Difficulty & Safety: While ice shelves are receding, they are often undercut by the current and can collapse without warning; never stand on ice overhanging deep pools. Stay vigilant for large upstream chunks breaking loose that can easily sweep you off your feet.

Float Notes: Low water means watch for "skinny" water and gravel bars if you're in a boat.

Understanding the Winter Metabolism: On the Bow River right now, water temperatures are hovering in that "low activity" zone. Because fish are cold-blooded, their body temperature matches the river. As the water temps drop significantly, their metabolism and activity levels drop accordingly.

This is why you aren't seeing aggressive "chase" behavior. A trout will rarely move three feet to crush a fast-moving streamer right now—the caloric payout isn't worth the energy spent.

The Strategy: Why These Techniques Work

• Targeting "Walking Speed" Water:
  Fish are stacking in deep, slow runs to avoid fighting the current and it's not as influenced by colder air temperatures. Fish are looking for the "path of least resistance." By targeting water moving at a walking pace or slower, you are putting your fly in the only place a fish can afford to sit without burning more calories than they consume.
  
• The Science of Sun Exposure:
  While we often focus on air temperature, solar radiation is the real catalyst in February and March. Even if the water remains cold, direct sunlight on the dark cobble of the Bow’s riverbed creates micro-climates of warmth. This subtle shift can "wake up" the aquatic insects (like midges), which in turn creates a localized feeding window. Focus on water that has been basking in the sun for several hours.
  
• Why the Small Stuff (Midges & Blood Worms):
  Midges are the primary biomass available during the winter. Fish prefer "snacking" on consistent, readily available larvae and pupae. Red blood worm patterns are particularly effective right now as melting snow and ice can dislodge these from the silt, making them an easy, high-protein "freebie" for a trout.
  
• The Trout Spey Advantage (The "Swing"):
  A slow, deep swing keeps the fly in the fish’s narrow strike window for the maximum amount of time. You are essentially appealing a fish by hovering a leech or baitfish right in its face until it decides to take the easy and vulnerable meal.

The Midge "Ticket" (The Daily Bread)

Midges are thick in the afternoons, and although we didn't see any Blue-Winged Olives (BWOs), we're sure they'll be on the way soon. Keep an eye out on those overcast, "fishy" days this month. If you see subtle sips in the foam lines, reach for the dry-dropper or a double-midge rig.

• The Behavior: Look for "dimpling" rises in the softest back-eddies. These aren't aggressive splashes; they look like tiny raindrops.
• The Play: If you see those sips, fish a Griffith’s Gnat. If you don't see rising fish, they are likely eating the pupae just under the surface. Swing a beadless midge pupa in the top 6 inches of the water column. Or you can fish bloodworm nymphs in the bottom of the water column with an indicator.

We're still on the Blood Worm train. These are the larval stage of the midge. They live in the silt, and when the ice melts or the water fluctuates, they get kicked into the drift. They don't "hatch" in the traditional sense, but because they are bright red, trout can see them easily in the low-light depths of a winter pool.

Nymphing: Still the most consistent producer.

Streamers & Swinging: It's time to speed things up. The getting those flies right in the fish's face is still a good bet, but don't be afraid to add some erratic movement to your retrieve. Sparkle Minnows or Kreelex in olive/gold are starting to turn heads.