Why the Trails at Fremont Lake's Outlet Go Quiet in November

"No human presence." That's the wording of the Bridger-Teton National Forest closure order for the land near the outlet of Fremont Lake. Pinedale Online carried the reminder on October 29: the closure runs every year from November 1 through November 30, and again from April 1 through April 30. The Forest Service set it up together with the Wyoming Game and Fish Department. It covers what managers call the "Fremont Lake Bottleneck."

Most Pinedale residents know that place by different names. It's the marina, the multi-use trails at the CCC Ponds, the stretch of Pine Creek below the lake, and the paved FS 111 and CR 154. These are some of the most-used spots on the edge of town. For one month each fall, they are also the narrowest point on a mule deer migration that the Forest Service says goes farther than any other mule deer migration ever documented. The herd those deer belong to came out of the 2025 hunting season larger than it was a year earlier.

Where a 150-mile route squeezes down to the marina

The Sublette mule deer route is often called Red Desert to Hoback. The Wyoming Migration Initiative's assessment of the route puts it at 150 miles one way. Some deer go much farther. The Wyoming Game and Fish Department has reported on one collared doe that traveled 247 miles one way to Idaho.

All that open country leads to a few tight crossings at the outlets of the Finger Lakes. The same assessment estimates that 4,000 to 5,000 deer pass through these lake-outlet bottlenecks, including the crossing at Pine Creek below Fremont Lake's outlet. The assessment says the deer move through the Finger Lakes segment mostly in late October and November. The closure covers the November part of that window.

The assessment maps the fall crossing at Fremont Lake in this order:

1. Across CR 154
2. Through the CCC Ponds area and past its multi-use trails
3. Across FS 111, the paved road up toward the lake
4. Down to Pine Creek, where deer either cross the creek or swim the lake outlet

The Forest Service notice explains why this stretch causes so much concern. Fremont Lake hems in the corridor on the north side, and homes hem it in on the south. The deer also have to get past a lot of human activity along the way. On a map, the route is a long ribbon of sagebrush and timber. At this spot it pinches down to the gap between the lake and the edge of town, right where people launch boats and walk trails.

That's the reason for a full "no human presence" closure. Here the deer have no easy way around. The Forest Service says signs will be posted at key entrances to the closed area. Rusty Kaiser, the Bridger-Teton wildlife biologist on the Pinedale Ranger District, can answer questions at 307-231-5980.

The herd heading into this fall grew last year

The closure dates repeat every year, while the herd's size changes from one winter to the next. The Game and Fish department's March 2026 update on the Wyoming Range and Sublette herds says the Sublette herd came through the severe winter of 2022-23 in better shape than the neighboring Wyoming Range herd. It also says several mild, mostly snow-free winters in a row have helped both herds recover.

The department's post-season numbers for the Sublette herd, compared with the Wyoming Range herd next door:

Brandon Scurlock, the department's wildlife management coordinator for the Pinedale region, said in the update that both herds "have demonstrated incredible resilience over time, rapidly recovering from periodic high winter mortality." Those 2025 counts include 77 fawns for every 100 does, so a good share of last year's herd was young animals. All of them depend on the same narrow ground at the outlet.

What the edge of town has already done for the deer

The November closure is one of several steps taken to keep this crossing open. According to the Forest Service notice, non-wildlife-friendly fencing near the bottleneck has been removed. The Game and Fish department also acquired the Luke Lynch Wildlife Habitat Management Area, just west of the closure area.

A 2017 Game and Fish account describes that work. The bottleneck property is 364 acres. Partners on the project replaced 1.5 miles of old fence with pole-top fence that deer can get over more easily. Anyone who has built or repaired fence on Sublette County acreage knows 1.5 miles is a lot of fence. Taking it out and rebuilding it changed how the crossing works for every deer that has used it since.

The highway has changed too. The Trapper's Point overpass on US 191 west of Pinedale opened in 2012 for pronghorn. In a 2025 Wyoming Wildlife magazine feature on crossings, the department shows that mule deer use it as well.

Trappers Point was also the site of a state announcement this past summer. On June 26, 2026, Governor Gordon announced the designation of the Sublette antelope migration corridor. That designation was for pronghorn. The same release lists the Sublette mule deer corridor among the state's mule deer corridors that were already designated. The Game and Fish big game migration page also lists the Sublette mule deer corridor as designated.

Watching the migration without stepping into it

The marina and the CCC Ponds are closed to everyone this month, so the outlet isn't a place to watch from. The Trappers Point Overlook is. The Museum of the Mountain Man describes the site as 10 acres off US 191, with a quarter-mile walk to the overlook. It looks out over the same corridor of US 191 that the overpass serves. Bring binoculars and use the pullout, not the shoulder.

The museum itself is closed for the season as of November 1. Off-season visits are by appointment, and it plans to reopen in May 2027.

For an evening in town that's tied to the deer, the Pinedale Online community calendar lists a Mule Deer Foundation "Mule Deer Palooza" at Wind River Brewing Company. It runs Thursday, November 12, from 7 to 9 p.m. It's a raffle and fundraiser, not a talk.

On FS 111 and CR 154

The Forest Service notice lists FS 111 and CR 154 among the paved roads the deer must cross on their way through the bottleneck. During late October and November, those are the stretches where a driver heading to or from the lake is most likely to meet deer crossing the road. Slow down there through the end of the month.

The deer come back the other way in spring, and the same ground closes again from April 1 through April 30.

At Premier Horse Property, we spend a lot of time with Wyoming landowners talking about fences, gates and pasture on ground that wildlife crosses too. If you own acreage along a migration route near Pinedale and want to talk through how your fences and facilities fit with it, give us a call. We're always glad to walk a fence line with you.