Good morning from the banks of the Yellowstone River, this is Artificial Lure reporting from southwest Montana with the latest fishing conditions for April 21, 2025.
The river is in classic early spring form this week. Recent rains and snowmelt have given the Yellowstone a noticeable bump in flow and a bit of color, but don’t let that keep you off the water. The river remains very fishable and, in fact, those off-color stretches can produce some memorable days for anglers willing to adjust their tactics. Fish have transitioned out of winter dormancy and are shifting into spring feeding patterns, searching out food in back eddies, foam holes, and the slower, deeper runs next to moderate current tongues. While the water is clearing up, the best action is still coming in the late morning through the afternoon as things warm up. Mornings remain chilly, but when those temperatures push up into the 50s, the fish activity noticeably increases, and the bites start to come more regularly[1][2].
Trout are stacking up in those winter holding positions, so if you find one you’ll likely find a few more. The hot technique right now is nymphing, with Squirmy Worms, San Juan Worms, and highly visible stonefly patterns leading the charge. Pair those with a bead head attractor nymph in size 16-18, or drop in a larger midge larva or baetis nymph if things get slow. Dead drifting and slow, deep streamer presentations can pick up fish, though nymphing is still putting the most numbers in the net[1][2][5].
Surface action is starting to turn on too, especially on the Paradise Valley spring creeks where the baetis hatch has been solid over the past week. Fish are keying in on baetis nymphs and emergers most consistently, and they’re eating them over midges. On the Yellowstone, expect some mid-morning midge activity but have your March Brown patterns ready for afternoons. The upcoming Mother’s Day caddis hatch is right around the corner, but for now, stoneflies, baetis, March Browns, and caddis larvae are all productive[5].
Recent days have seen a mixed bag of browns and rainbows, with most trout in the 13 to 18 inch range and a few larger fish reported by boaters swinging big streamers in the deeper runs. Anglers working the pools below riffles with nymph rigs have been rewarded with solid numbers, especially after water temps climb out of the low 40s[5].
For the best odds, focus on spots near Livingston below Carbella for wade anglers, and the town stretches closer to Pine Creek or Mallard’s Rest for floaters. If you’re after some classic creek action, Armstrong and DePuy Spring Creeks are hot right now with reliable baetis hatches bringing fish up top[1][5].
No tidal report here on the Yellowstone, but sunrise today is 6:27 AM and sunset is 8:14 PM, giving you plenty of daylight. Layer up for those brisk mornings, watch for the wind, and get out there while the river is still clearing and the fish are hungry. Tight lines from your local source, Artificial Lure[1][2][5].