October is one of the last comfortable months to fish the Cimarron River before winter settles into the high country, and this year the trip comes with a welcome bonus. The Cimarron flows east out of Eagle Nest Lake through Cimarron Canyon State Park, a narrow, thickly wooded canyon off U.S. 64 between Eagle Nest and the town of Cimarron. It is a small tailwater that fishes like a classic freestone mountain stream, with riffles, pocket water, bend pools, undercut banks and beaver ponds packed into a tight corridor.
For New Mexico residents, day-use entry at most state parks is free from October 1 through April 30, according to the New Mexico State Parks Division. The division announced the waiver covers 33 state parks, with Living Desert Zoo and Gardens State Park and Rio Grande Nature Center State Park excluded. That makes a day in Cimarron Canyon, or up the road at Eagle Nest Lake State Park, an especially good value this fall. The waiver covers day use only, not camping, and anglers still need to follow current New Mexico fishing rules and licensing requirements, so check those before heading out.
The fishery is the real draw. Local guide information describes the Cimarron as one of the healthiest wild brown trout fisheries in New Mexico, with nearly 4,000 catchable-size trout per mile. Typical fish run 10 to 14 inches, with the occasional larger brown, and the Department of Game and Fish also stocks rainbow trout in the state park. About nine miles of public access run through Cimarron Canyon State Park, so there is room to spread out beyond the busiest pullouts, even on a bright October weekend.
Timing matters this month. The river generally fishes from early May through October, and from September into October anglers look for a Baetis, or blue-winged olive, hatch. October guide notes for the river list Baetis, midges and streamers for fly anglers, and small spinners for conventional tackle. Because the water is small and the browns are wary, short, light gear is the local standard: a 7.5- to 8.5-foot rod in 3- or 4-weight, a 7.5-foot leader tapering to 4X or 5X, and a quiet approach from downstream. Hip or chest waders both work well in the shallow canyon water.
The setting rewards a slower pace even when the fish are not rising. U.S. 64 runs right beside the river, beneath aspen and pine and, in places, sheer granite walls, including the Palisades, a roughly 400-foot jagged outcrop. Deer, elk and beaver are part of the canyon wildlife mix, and the fall color along the banks is near its best right now.
For campers, the off-season brings one more practical change: from October 1 through April 30, state parks allow a maximum camp of 14 days out of any 20-day period, double the peak-season limit, though regular camping fees still apply. Pack for cold mornings at canyon elevation, watch for changing weather, and give spawning-season browns in shallow gravel a respectful berth. Fished carefully and quietly, the Cimarron in October is small-water trout fishing at its most rewarding.