Fishing Report
Idaho Fly Fishing Report
Silver Creek • Big Wood • Lost River • Mackay Reservoir
- June 11, 2025

June 2025 Report
Silver Creek The Creek has been fishing well since the season opener. The Brown Drakes have come and gone. Hatches consist of Callibaetis, Baetis, midge and PMD’s. Weather has been up and down. Today temps are around 70 degrees and raining off and on with thunder/lighting. It’s a welcome relief since we have had some warm temps up into the mid to high 80’s, low 90’s. As I sit in my office here in Picabo writing this report, I’m listing to the big boomers crackling above my house.
Big Wood River The river is past the high runoff and is starting to drop. It’s flowing clear at 1050 cfs in Hailey. There are some Golden Stones hatching. Wading is difficult at these flows but if you can find the soft/slower currents along banks, trout can be caught.
Lower Big Lost River Releases from the dam are at 650cfs. Like the Big Wood, there are some golden Stones hatching. Above Mackay Reservoir flows are now at 800 cfs. Fishing is good if you can find the right spot with slower currents.
Mackay Reservoir Water levels are around 56/57 feet. Fishing is good and the inflows are seeing some PMD hatches.
- April 22, 2025

April 2025 Report
Silver Creek The Creek is open from Hwy 20 bridge west of Picabo downstream year-round. Upstream of this bridge will reopen Memorial Day weekend. Spring temps have been fluctuating with some days getting up to 65-70 degrees. The snowpack runoff is finished. Midges and a few BWO’s have been hatching and it’s possible to find rising trout.
Big Wood River The river is now closed and will reopen to fishing Memorial Day weekend.
Big Lost River The lower river is fishing well with a few BWO hatches. Water levels are around 100 cfs for easy wading. Spring snowmelt runoff is happening above the reservoir, so finding clear water can be problematic.
Mackay Reservoir The reservoir is filling up with the incoming snowmelt runoff. It is now at 56 feet. We are expecting it to fill completely this spring early summer. The Big Lost River is starting to run high and dirty. This can color up the north end of the reservoir making fishing difficult. It won’t last forever, so be patient and wait for the runoff to subside. Mid May is usually the peak runoff period.
- March 5, 2025

March 2025 Report
Silver Creek Weather temperatures have increased considerably as we moved into March. Afternoons temps have reached up to 50 degrees! Some anglers have been out taking advantage of these spring-like temps. We will see fluctuations in weather this month and the prospects for more snow are high. Spring is possibly just around the corner. Look for Midge activity and the odd Mayfly such as the small BWO’s. Remember, the lower section of Silver Creek from Hwy 20 bridge west of Picabo and downstream is open year round.
Big Wood River The Wood River is open till the end of March and then closes to fishing until Memorial Day weekend. Like Silver Creek, on the warmer afternoons fishing can be good with Midge or BWO’s. Streamer and nymph fishing also can produce hookups. With the current March snowpack, the water content in this drainage is approximately 110% of average. Not bad!
Big Lost River The Lower Lost River has been fishing well with the same hatches as Silver Creek and the Big Wood mentioned above. This river drainage is open year round.
Mackay Reservoir Its frozen but is slowly rising and is now at 53 feet. The Lost River drainage snowpack is at 100% of average, so we are expecting the reservoir to fill completely by early to mid May!
- February 6, 2025

February 2025 Report
Silver Creek Great News! The fishing season has been expanded on Silver Creek. Downstream of the highway 20 bridge just west of Picabo, it’s now open year-round. This will greatly add more angler opportunity during the spring months. There are some terrific hatches of midge with a few PMD’s during the cooler months April and May. The temps have been fluctuating wildly the past couple of weeks. We received the warm “pineapple express” storm a few days ago and it dumped near two feet of snow. What a blessing and that will add to our snowpack reservoir and aid the summer river flows. Today the temps dropped again into the single digits.
Big Wood River We are expecting another snowstorm tonight and into tomorrow. I doubt we will get as much snow as the last storm, but every little bit helps! The river is flowing at low winter flows. Fishing can be good in the afternoons on warmer days. The entire drainage is now up near 100% of average.
Big Lost River Winter low flows on the river with great fishing on warmer days. Drainage nearing 100% of average snowpack. More snow tonight.
Mackay Reservoir Frozen so it’s an ice fisherman’s dream.
- January 21, 2025

January 2025 report
Silver Creek Happy New year! Presently the temps have been down to 5 below zero at night with daytime highs in the mid to high 20’s. Sufficient to say with these temps and slush ice floating in the stream, there’s not much fishing.
Big Wood River Like Silver Creek, the slush ice is flowing on the River. Winter fishing will improve once temps rise probably in February. The good news is that the winter snow-pack and water levels are way ahead of last year and our at 90% of average. This bodes well for summer water levels.
Big Lost River Dido for the Big Lost River. Too cold to fish. Temps can turn around quickly for the winter fisherman. The river drainage is about 80% of average. We will no doubt receive more snow in February and March adding to our snow-pack and summer water flows.
Mackay Reservoir If your an Ice fisherman with a portable tent of sled/hut, its worth a try. The water levels have risen to 48 ft.
- November 9, 2024

November 2024 report
Silver Creek As of the first week in November, there’s no snow on the ground with a light snow dusting in the mountains. Temps are down to the teens at night and rising up to the low to mid forties in the afternoons. The brown trout spawn is about over for the autumn season. Tributaries and the Nature Conservancy Preserve will close to fishing December 1st, reopening memorial Day weekend. Downstream of Kilpatrick bridge, fishing remains open till April 1st.
Big Wood River The Wood river is flowing at 160 cfs. Fishing remains good in the afternoons as temps rise. The river remains open till April 1st, reopening Memorial Day weekend.
Big Lost River The river below the reservoir, flows are at 60 cfs. Like the Wood river, fishing is best in the afternoons as temps rise. Fishing remains open year round.
Mackay Reservoir Since the dam releases are low, the reservoir level is slowly rising again by approximately 6 inches per day. Currently it is at 30 feet. It will not be long if temps drop in late Novemeber early December, surface ice will develop.

Idaho Fly Fishing Report
David T. Glasscock
Idaho Angling Services
Guided fly fishing 208.720.8169
Idaho Angling Services, LLC
208 David Street
Bellevue, Idaho 83313
info@anglingservices.com