Tributary Spawning Protection
Protecting Lake Pend Oreille’s Trophy Fishery:
Why It’s Time to Reinstate Seasonal Closures
Lake Pend Oreille is home to one of the most unique and celebrated fisheries in the United States; the Gerrard rainbow trout trophy fishery. For decades, careful management preserved this world-class resource, ensuring sustainable populations and exceptional angling opportunities. However, recent changes in regulations, combined with new ecological challenges, have placed this fishery at risk. Heavy spring angling pressure, invasive predators, habitat degradation, and the loss of supplemental stocking threaten the long-term health of rainbow trout populations. To safeguard this irreplaceable resource, it is critical to restore proven management practices that protect spawning fish during their most vulnerable period.
Why the Rivers Were Opened, and Why That Time Has Passed
For decades, Lake Pend Oreille’s tributaries were closed to fishing to protect rainbow trout during their spawning season. This changed in the early 2000’s when kokanee populations plummeted. To address the decline, Idaho Fish and Game allowed year-round fishing on the Clark Fork River, Lightning Creek, Pack River, and Spring Creek to reduce rainbow trout and lake trout.
After years of focused management, kokanee rebounded, and trophy regulations were reinstated on the lake. Tributaries shifted to catch-and-release rules. However, spring fishing pressure has surged, leading to snagging, harassment of fish on spawning beds, and mishandling, all of which cause mortality and failed spawning. These impacts underscore why seasonal closures were originally in place.
New Predators in the River System
Over the past 20+ years, Lake Pend Oreille has seen the introduction of smallmouth bass, walleye, and northern pike. These invasive predators have spread throughout the lake and tributaries, thriving on kokanee and reproducing rapidly in diverse conditions. The Clark Fork River now holds particularly high concentrations of smallmouth bass and walleye, creating an escalating threat to rainbow trout fry and fingerlings returning from spawning tributaries.
Heavy Spring Angling Pressure
Since rivers opened to fishing, angling pressure during the spawning season has reached unprecedented levels. Anglers often target large rainbows in shallow spawning areas for trophy photos. Along Johnson Creek Road and near the Lightning Creek confluence, more than 20 boats a day crowd a 1/8 mile stretch of river. Derr Island’s boat launch is overwhelmed, and Lightning Creek has become a hotspot for snagging fish on redds during spawning.
Wildfires and Habitat Degradation
Recent wildfires in headwater tributaries have destabilized slopes, increasing mudslides and silt deposits in critical spawning grounds. Lightning Creek, which is the primary spawning tributary for multiple species, has been severely impacted. Burn scars make the drainage highly vulnerable to landslides, further degrading spawning habitat.
Loss of Gerrard Fingerling Supply
Idaho Fish and Game has relied on Canadian-sourced Gerrard rainbow fingerlings, the original strain introduced in the 1940s from the Lardeau River. That supplier will no longer provide fingerlings, meaning if rainbow populations decline, we cannot replenish stocks. This puts the genetic integrity of this unique strain at risk.
Community Commitment to Conservation
Over the past decade, Lake Pend Oreille’s fishing culture has evolved significantly, reflecting a growing commitment to sustainability. Fishing derbies, which once focused on harvesting large catches, have largely transitioned to catch-and-release formats. This shift demonstrates that anglers and local organizations are already taking proactive steps to protect the lake’s trophy fishery. By prioritizing fish survival and reducing harvest pressure, these events reinforce the shared responsibility among stakeholders to safeguard the Gerrard rainbow trout population. Seasonal closures would complement these efforts, aligning regulatory measures with the conservation ethic embraced by the angling community.
The Only Trophy Gerrard Fishery in the U.S.
Lake Pend Oreille hosts the only Gerrard rainbow trout trophy fishery in the United States, a world-class resource that deserves protection. While other species inhabit the lake, the Gerrard rainbow stands out as a long-standing trophy fishery that should be managed accordingly.
Our Goal
Implement seasonal fishing closures during the critical spawning period to protect Gerrard rainbow trout populations:
- Clark Fork River: Closed March 1–May 15, from River Road Bridge downstream to Lake Pend Oreille.
- All Other Tributaries: Closed during the same period to protect spawning fish and ensure long-term sustainability of this unique fishery.
Lake Pend Oreille’s Gerrard rainbow trout fishery is a rare and irreplaceable resource, one that anglers across the country recognize as world-class. But without decisive action, mounting pressures from invasive species, habitat degradation, and uncontrolled spring angling could jeopardize its future. By reinstating seasonal closures during spawning, we can protect this fishery for generations to come. The time to act is now before we lose what makes Lake Pend Oreille truly extraordinary.