In most years, Kilpatrick Pond is the last corner of the Silver Creek Preserve to close. Under Idaho Department of Fish and Game rules, the pond stays open for catch-and-release fly fishing through March 31. The preserve's main reach closes on November 30. So why is the pond off limits to the public right now, a full month before the rest of the preserve shuts down?
Two projects with different owners, different funding and different paperwork were set up to share one stretch of creek and one winter. Blaine County is replacing Kilpatrick Bridge. On the other side of the bridge, The Nature Conservancy and Picabo Livestock Co. are dredging the pond. Both aim at the same thing: water that runs colder and moves more freely past the spot where the creek has been warming.
Two projects, scheduled to overlap
The bridge belongs to Blaine County Road and Bridge. County commissioners approved its stream alteration and wetlands permits on January 27, 2026. At that hearing, Brandon Keller of Keller Associates described the work as replacing the existing load-posted, two-span bridge with a wider, longer single-span bridge paid for through a federal aid package. The federal aid runs through LHTAC, and the design follows Idaho Transportation Department bridge standards. The state itself is not the applicant.
The detail that matters most for the creek is the center pier. According to the commissioners' minutes, the board's questions included removing that pier "to improve flow and reduce debris or ice buildup." The county's design calls for a 108-foot bridge with a 102-foot clear span, wider road approaches, and four-foot paths down to the creek banks on the east side. The project team also said the west side would stay largely as it is, per discussions with The Nature Conservancy, and that ADA-accessible access is part of the east-side plan.
The same hearing explains why the dredging is happening now. During public comment, Nick Purdy, a nearby property owner, said he planned to apply to dredge the pond near the bridge and asked the board to keep the two jobs coordinated. The minutes show the project team discussing "coordination with Nick Purdy's anticipated pond dredging project." That application went through. The Idaho Mountain Express reported that commissioners approved a permit for The Nature Conservancy and Picabo Livestock Co. to remove 32,000 cubic yards of sediment and overgrowth, in a $700,000 project timed to start around October 1 alongside the bridge rebuild.
Kilpatrick Bridge sits right at the seam of the project area, with Picabo Livestock Co. land to the east and Nature Conservancy land to the west. Both jobs are working in the same construction window.
What the sediment was doing to the water
Silver Creek's reputation rests on cold, steady spring water. The Nature Conservancy credits the creek's cold water, gentle flow and gravel bottom for the insects and aquatic plants that make it a blue-ribbon trout stream. At Kilpatrick Pond, sediment has been eating away at that advantage.
A county memo quoted by the Mountain Express describes the project area as "burdened by immobile sedimentation and an overgrowth of macrophytes," which raises water temperature and lowers dissolved oxygen. Silver Creek Alliance Executive Director Greg Loomis told the paper this has happened before. Before a dredge about 10 years ago, water temperatures had risen 3 to 6 degrees as sediment piled up on the Conservancy side of the bridge. After that dredge, temperatures stopped climbing and even fell by 2 degrees.
"But it has started to increase again."
Greg Loomis, Silver Creek Alliance, speaking to the Idaho Mountain Express
Loomis traced the buildup to runoff from tilled fields and airborne dust from those fields, and said work has started on buffer zones between the creek and agricultural land to slow it down in the future. Private donations through the Alliance are paying for the dredging, according to the Mountain Express. Nicholas Purdy, vice president of operations at Picabo Livestock Co., told the paper the project matters more to the wider community than to the company "because it will improve the fish habitat of the stream."
So a closed pond and a fenced bridge are this fall's version of a cleanup that is meant to keep the water cold. The trade-off shows up in how you get onto the water this November.
Getting onto the preserve before November 30
The preserve stays open dawn to dusk all year, and fishing on the main reach runs through November 30. What changes is the route in and the water you can reach. Here is the picture from the Conservancy's alert and the two local fly shops:
- Kilpatrick Bridge and east-side access are closed for construction. Silver Creek Outfitters' October 13 forecast said the bridge work and pond dredging are scheduled through January 4. Picabo Angler's October 9 report said Kilpatrick Road is closed through at least the end of the year.
- Come in on Stalker Creek Road. Picabo Angler says anglers who want to fish the preserve must use Stalker Creek Road, which the shop also calls Stocker Creek Road. The walk-and-wade section is fishing as usual.
- The S-Turns have been closed to fishing since October 8, and Picabo Angler's October 16 report says there is still no public access to Kilpatrick Pond.
- Float tubes and floaters are done for the season here. The Conservancy's preserve page limited float tube fishing between FT1 and FT4 to September 30, and says the downstream take-out is closed with no portage allowed across preserve property.
- The Conservation and Education Center is open weekends only, 10 a.m. to 2 p.m. on Saturdays and Sundays from mid-October through the end of November, then closed from December through April.
Silver Creek Outfitters adds that the work brings several kinds of closures beyond fishing, including floating, waterfowl hunting, parking and hiking. For bridge questions, the shop points people to Blaine County at (208) 788-5500. For preserve access questions, it lists (208) 788-7910.
What's on the water in late October
Both shops describe a creek that rewards a slow start. In its October 16 report, Picabo Angler says Silver Creek "is fishing well right now," with Baetis, Mahogany Duns and October Caddis. Activity really picks up in the very late morning and early afternoon. The Baetis run small: size 18 to 22, with a 16 counting as large. Mahogany Duns are a 16, and October Caddis run 10 to 14. The shop says Callibaetis, beetles and ants are fading as nights get colder.
Silver Creek Outfitters agrees that Baetis are the main food. Its forecast suggests duns, cripples and spinners in sizes 20 to 24, and notes that fish tend to choose Mahoganies or October Caddis over Baetis when those bigger bugs show up. On days with no bugs, wind can make terrestrials work, and a dry-dropper with size 16 to 20 pheasant tails or Baetis nymphs is another option.
Both reports raise the same seasonal caution. Brown trout are moving into their spawn, so anglers should stay off fish on or near redds. Picabo Angler describes redds as oval depressions in the streambed that look cleaner and lighter than the gravel around them. At dawn and dusk, the shop suggests a streamer or leech fished to the deepest, darkest water for a shot at a large brown.
Where the water stays open after November 30
The preserve's closing date doesn't end the season on the whole creek. IDFG splits Silver Creek into sections with different rules, and this year's construction changes which of them you can actually reach. Here is a summary from the IDFG 2025–2027 Fishing Seasons & Rules, second edition 2026:
| Section | Season | Rules |
|---|---|---|
| Highway 20 bridge near milepost 187.2 upstream to the Grove Creek and Stalker Creek confluence | Saturday of Memorial Day weekend through November 30 | Catch-and-release, fly-fishing only, one barbless hook per fly; float tubes allowed, no rafts or boats |
| Kilpatrick Pond, diversion dam upstream to Kilpatrick Bridge | Saturday of Memorial Day weekend through March 31 | Catch-and-release, fly-fishing only; no public access during this year's construction |
| Mouth of Silver Creek upstream to the Highway 20 bridge | Open all year | Two-trout limit, none between 12 and 16 inches |
The bottom row is where the winter fishing is. Picabo Angler names the lower sections at the Highway 20 Bridge, Silver Creek West and East at the Willows and Point of Rocks, and the North Picabo Road Bridge as spots that will fish well through October and into winter. In a normal year, Kilpatrick Pond would sit alongside them as a winter option. This year it's under construction. This table summarizes published rules for general information only. It isn't legal advice, so check the current IDFG rulebook and any posted notices before you fish.
Once the crews leave, this corner of Silver Creek will look different, with a single span where the old pier stood and new paths down to the east bank. The goal is a pond that isn't adding heat to the water flowing past it. According to Loomis, temperatures held after the last dredge about 10 years ago and have since started to climb again. For more background on how conservation has shaped this creek, see our earlier piece on Silver Creek and our Blaine County neighborhood guide.
If a winter of cold spring creeks and quiet county roads has you picturing a place closer to Picabo and the Bellevue Triangle, Corey Graham SIR would be glad to help you find land and a home within easy reach of Stalker Creek Road. Be the first to see new listings.
