Skip to main content


The most iconic and spectacular landscapes in the San Juan Mountains deserve protection. This bill would expand wilderness designations and safeguard beloved high country destinations, like Ice Lake Basin, from future mining. Photo: Jack Brauer

Protecting Beloved Mountainscapes in the Heart of the San Juans

On May 17, 2023, Colorado Senators Michael Bennet and John Hickenlooper, along with Rep. Joe Neguse, reintroduced the San Juan Mountains Wilderness Act as part of the Colorado Outdoor Recreation and Economy (CORE) Act, a state-wide public lands protection bill. This is the latest in a decade-long grassroots process to secure needed protections for 60,000 vulnerable acres in the heart of the San Juan Mountains.

Half of the acreage would expand or create wilderness for well-known vistas, like the Sneffels Range and Lizard Head, while the other half would ensure management protections from mining, roads, and oil and gas development for Ice Lake Basin and Hope Lake.

West Slope Voters Overwhelmingly Support the CORE Act!

A 2019 survey of Colorado voters on the Western Slope found overwhelming support for the Colorado Outdoor Recreation and Economy (CORE) Act, of which the San Juan Mountain Wilderness Act is now a part. In addition, voters from both parties support additional Wilderness designations and keeping public lands in Wilderness Study Areas.

Photo: Ice Lakes by Jack Brauer

Protections proposed in the CORE Act:


Mt. Sneffels Wilderness Additions

The bill proposes to double the size of the existing Mount Sneffels Wilderness. The inclusion of Whitehouse Mountain completes wilderness designation for one of the most recognizable mountain scenes in Colorado – the blazing fall colors of the Sneffels Range as viewed from Dallas Divide. The wilderness addition is bounded on the south by the Camp Bird Mine Road, which leads to Yankee Boy Basin and other four-wheel-drive routes heavily utilized during summer months.

Near Telluride, the Last Dollar/Sheep Creek addition incorporates the entirety of Mill Creek Basin into the wilderness, and the Last Dollar addition extends the wilderness boundary west out to the Last Dollar Road. These add lower aspen-blanketed slopes to the wilderness.

See detailed map for Whitehouse Mountain addition.

See detailed map for Last Dollar addition.

Photo: Jack Brauer


Lizard Head Wilderness Additions

A set of wilderness additions is proposed to round out the boundary of the Lizard Head Wilderness. These reflect recent Forest Service land acquisitions, the addition of lower forested slopes, and the protection of the scenic backdrop of the San Juan Skyway. The largest portion is located in Silver Pick Basin and adds the west face of 14,017-foot Wilson Peak into the wilderness, a result of Forest Service acquiring a handful of patented mining claims in the basin in 2015. Other additions include the aspen-covered slopes below Sunshine Mountain and the scenic slopes below Black Face and San Bernardo Mountain on Lizard Head Pass.

See detailed map.

Photo: Sheep Mountain Alliance


McKenna Peak Wilderness

McKenna Peak would be the first wilderness designated under BLM administration in southwest Colorado. McKenna Peak’s eroded adobe badlands are presided over by imposing sandstone cliffs that rise 2,000 feet above the plain. The bill designates the northern half of the existing McKenna Peak Wilderness Study Area (WSA) in San Miguel County as wilderness and leaves the southern half in Dolores County as a WSA. Local county commissioners support these protections.

See detailed map.

Photo of McKenna Peak

Sheep Mountain Special Management Area

Sheep Mountain is one of the largest, undeveloped roadless areas in Colorado not designated as Wilderness. It includes the popular trail to Ice Lake Basin, cherished for its many lakes nestled in expansive fields of wildflowers and bordered by slopes and peaks streaked with color. The area takes in the headwaters of South Mineral Creek, just outside the Bonita Peak Mining District where hard rock mines have long polluted the Animas River headwaters.

Sheep Mountain has been long recognized for its wilderness character, with citizen wilderness proposals dating to the 1970s. Several incompatible activities in the form of heli-skiing and the use of Hope Lake as part of Excel Energy’s Ames hydroelectric project preclude full-fledged wilderness designation. The bill would, however, create a Special Management Area, similar to the 2014 Hermosa Creek Watershed Protection Area, to protect it against future mining of the type that has long polluted the Animas and from new road construction. The designation applies to lands in San Juan and San Miguel counties, but in the future additional area in adjacent Dolores County could be added.

See detailed map.

Photo of San Miguel Peak Sheep Mountain

Naturita Canyon Mineral Withdrawal Area

Naturita Canyon is a tributary to the San Miguel River near Norwood, with canyon slopes dominated by pinyon-juniper, gamble oak, and ponderosa pine. It’s important as a municipal water supply but has been threatened by oil and gas development in the past. The bill prohibits future oil and gas leasing in order to protect community water sources.

See detailed map.

Photo of Naturita Canyon

Photo: Sheep Mountain Alliance

Recent News (More)

Recent Court Ruling Overturns Prior Development Rejections, and Reignites Controversy over the Pillage Wolf Creek

| Lands Protection, Wolf Creek | No Comments
The Pillage at Wolf Creek is an ill-conceived fantasy of an out-of-state billionaire, who railroaded his vision through the federal bureaucracy without regard for the environment and communities it impacts.

Take Action: Say NO to Uranium Exploration and Mining in Slick Rock Canyon

| Lands Protection, Rivers, Take Action | No Comments
We oppose exploratory drilling and uranium mining in Slick Rock Canyon for these reasons. We ask that you deny the local county permit.

Take Action: Help Improve the BLM’s Big Game Plan

| Lands Protection, Take Action, Wildlife | No Comments
Please join the San Juan Citizens Alliance in showing our support for BLM’s new public lands rule on Conservation and Landscape Health. The new rule emphasizes the importance of conservation on federal public lands and creates and refines tools to…

PRESS RELEASE: Big Game Migrations, Habitat May Benefit with Draft Colorado Plan

| Lands Protection, Press Release, Wildlife | No Comments
The Bureau of Land Management (BLM) just released its Draft Big Game Resource Management Plan Amendment (plan) which covers 8.3 million surface acres and 4.7 million acres of mineral estate extending to every Colorado BLM Field Office and to every corner of…

Stay informed about the CORE Act!