Fishing Report for Yellowstone River, Montana
Date: April 4, 2025
The Yellowstone River is beginning to show signs of spring, offering anglers a promising day of fishing despite the lingering chill. Sunrise today was at 5:38 AM, and sunset is set for 7:08 PM, giving plenty of daylight to cast your lines. Temperatures are cold, with highs reaching 38°F and lows dropping to around 20°F, so dress warmly and prepare for possible snow showers. The river is flowing at 1,040 CFS at Corwin, providing decent conditions for fishing.
Currently, nymphing is the most effective technique, as water temperatures remain cool. Effective patterns include beadhead princes, pheasant tails (sizes 16-20), zebra midges (16-22), and smaller rubber legs in brown or black (sizes 8-12). Midday midge hatches are observed on warmer days, so dry flies like Griffith’s Gnats or purple haze (sizes 16-22) may also lure rising trout. Streamers like Woolly Buggers or Zirdles can be productive when fished slowly in deeper waters.
Recent catches indicate a good mix of species, including Yellowstone cutthroat trout (10-24 inches), brown trout (14-24 inches), rainbow trout (12-22 inches), and Rocky Mountain whitefish (14-18 inches). Anglers report strong action in slower runs and deeper, protected areas where trout are concentrated. The best fishing hours are late morning to mid-afternoon when water temperatures rise slightly, increasing fish activity.
Hot spots include the stretch from Gardiner to Yankee Jim Canyon, known for pocket waters and scenic beauty—ideal for dry fly fishing targeting Yellowstone cutthroats. Another popular section is Paradise Valley near Emigrant, offering easy access and reliable fishing. For larger fish and solitude, consider the lower Yellowstone near Big Timber, where streamer fishing in slower pools can yield trophy browns.
For lures, the tried-and-true Jakes Spin-A-Lure remains a top choice for spin anglers, while fly fishers should focus on matching the seasonal hatches. During this time, blue-winged olives, midges, and early march browns are emerging. Anglers should avoid scented bait, as it is not allowed in Yellowstone, and ensure all hooks are barbless to comply with regulations.
With streamflows stable and pre-runoff conditions still in place, now is a great time to fish the Yellowstone River. Just prepare for variable weather and enjoy the tranquility of this legendary freestone river. Tight lines!