Spring Trout Bonanza on the Bighorn: Brisk Conditions, Hungry Fish, and Productive Flies

Good morning folks, Artificial Lure here with your latest report from Big Horn, Montana, for April 18, 2025. We’re waking up to fresh snow and gusty winds this morning in the Bighorn Valley, with a winter storm warning lingering until noon. There’s anywhere from 4 to 12 inches of wet snow on the ground, especially close to the mountains and up by the canyon, and winds have been pushing 35 miles an hour. This weather has made some roads pretty slick, so if you’re coming from out of town, plan on some extra time and drive safe. Luckily, by the time you’re on the water, the worst of the storm should be clearing off and leaving us with brisk, fishy spring air and a river in prime shape[6][1]. Sunrise hit just before 6:20 a.m. and sunset will be around 8:03 p.m. today, so anglers have plenty of daylight to work with. No tides to worry about here, just consistent flows fed by the Afterbay Dam. Fishing on the Bighorn has been excellent despite the chilly weather. Crowds are light, the water is running clear for the most part, and the bite has been steady—hungry post-winter trout are on the move. Water temps are still cold, so most fish are holding deep and nymphing is far and away your best bet today. Best nymph patterns lately have been Cotton Candies, Tailwater Sows, Copper Zebras, Green Weenies, UV Scuds, and Pill Poppers in size 14-18. Red Bead Carpet Bugs and various worms (red, pink, orange) have also been pulling fish out of the deep slots. If you’re tying your own, don’t leave home without some Firebead Ray Charles in tan, pink, or gray, and classic Bighorn Scuds[1][3][4]. Streamer fishing is picking up steam as temps nudge upwards through the day. Sparkle Minnows, Rusty Trombones, Pete’s Buggers, and even a good old Goldie are drawing strikes from bigger browns, especially late afternoon once things warm up a touch. Strip them low and slow through deep buckets and runs[1][3]. Not much topwater action yet—midges are showing and you might spot a few BWO’s downriver, but most fish are staying subsurface until water warms further, likely in another week or two[2][5][8]. On the catch front, anglers are reporting strong numbers of healthy browns and rainbows, many pushing 16 to 18 inches, with some bigger fish mixed in. The slots below Afterbay Dam, Three Mile, and the edges around Two Leggins and Mallards have been especially productive. For those willing to risk the weather, these classic hot spots are tough to beat today[2][5]. If you’re more of a spin angler, small Rapalas in rainbow or silver, Panther Martins in brown or gold, and gold spoons like Cast Masters are solid choices. Just remember to swap out those trebles for single hooks to minimize damage[7][10]. No bait is allowed in the upper Bighorn, so keep it artificial and keep it moving. Bundle up, bring your patience for the weather, and get ready for some feisty spring trout. Tight lines from Artificial Lure—see you on the water! This content was created in partnership and with the help of Artificial Intelligence AI.