Pecos Wilderness, Protected wilderness area in northern New Mexico, US.

Pecos Wilderness is a protected area of 223,667 acres in the Sangre de Cristo Mountains of northern New Mexico, within the Santa Fe and Carson national forests. It holds deep, narrow canyons, broad mesa tops, forested slopes and ridges rising from 8,400 feet to over 13,000 feet. Engelmann spruce, corkbark fir, ponderosa pine and aspen cover the slopes, and about 150 miles of streams hold rainbow, brown and cutthroat trout.

The area was inhabited for thousands of years, with evidence of early human activity in prehistoric times. Official protection as a designated wilderness came in 1964 to preserve the natural landscape.

The area takes its name from the Pecos River flowing through it. Visitors today experience the landscape through hiking and mountain activities, surrounded by rock formations and alpine meadows.

The area is easily accessible for hiking and mountain activities during warmer months, though winter snow limits access. Visitors should come prepared with sturdy footwear and water supplies since the wilderness has no facilities.

South Truchas Peak, at 13,102 feet, is the second-highest summit in New Mexico, while Santa Fe Baldy, 12,622 feet, is the highest point in Santa Fe County. The wilderness holds one of New Mexico's densest clusters of peaks above 12,000 feet.