Hopewell Lake is one of the quietest pieces of trout water in the Carson National Forest, and October is the month to check its status before making the drive. The Forest Service currently lists the Hopewell Lake Day Use Area as closed, so anyone hoping for a late-season picnic or a last cast should confirm conditions with the Carson before heading up Highway 64.
The lake sits at about 9,800 feet, according to the Forest Service, between Tres Piedras and Tierra Amarilla in Rio Arriba County. From Tres Piedras, the route runs 19.5 miles west on Highway 64, then south on Forest Road 91B and west on Forest Road 356. From Tierra Amarilla, it is 29 miles east on the same highway to the same turnoff. At that elevation, October weather can turn quickly, and a calm morning can give way to wind and cold by afternoon.
When it is open, the appeal is easy to understand. Recreation.gov describes Hopewell as a small, man-made lake of 14 acres, set in conifer and aspen forest, and regularly stocked with rainbow trout, with brook trout also present. The neighboring campground has 31 sites, a group day-use shelter and a group overnight site, plus horse corrals and water troughs at two sites, because the Continental Divide National Scenic Trail passes through the campground and draws hikers and horseback riders.
Anglers should also know the boat rule before they haul anything to the shore. New Mexico fishing rules restrict boats at Hopewell Lake to oars or electric motors only, which suits the lake's small size and keeps the water quiet. Recreation.gov also notes that vault toilets are provided at the campground, bears frequent the area, and visitors should bring their own water, since water is not available at the campground.
The closure listing is a reminder of how short the high-country season can feel. The Forest Service opened Hopewell Lake early in spring 2026, and by mid-October the day-use status has already flipped. Seasonal vehicle restrictions on Carson roads are also part of the fall picture, set out district by district in the forest's Motor Vehicle Use Maps, including for the Canjilon, El Rito and Tres Piedras districts around Hopewell Lake.
For now, the practical move is simple: check the Forest Service recreation page or call the Carson National Forest at 575-758-6200 before driving out, pack for cold weather if access reopens, and treat any late-October visit as weather-dependent. Hopewell rewards patience in summer. In October, it rewards planning first.