Priority Initiative

I-70 East Vail Pass Wildlife Crossings
I70 East Vail Pass Wildlife Crossings logo

Why East Vail Pass?

Ecological Significance

The I-70 East Vail Pass has long been identified as an ecologically significant site both within and beyond Colorado for a variety of wildlife species including elk, mule deer and one of the few known breeding populations of Canada lynx outside of southwest Colorado. Nestled in the mountains between Copper Mountain and the top of Vail Pass, this corridor is encompassed entirely by the White River National Forest, including the Eagles Nest Wilderness to the north.

Canada lynx running 

Heavily Trafficked Corridor

Interstate 70 and its constant traffic flows effectively bisect wildlife movements north and south of the interstate. An important travel corridor for Colorado’s adventure community, residents, tourists and industries, this stretch of I-70 sees, on average, 22,000 vehicles a day. This much traffic presents a significant barrier to wildlife and many animals no longer attempt to cross. Those that do are often unsuccessful.

The Vision

I-70 on East Vail Pass is a divided highway with a wide, natural, open median. Five large span bridges are present under the eastbound highway lanes; however, there is only one bridge under the westbound lanes and no direct connections between these bridges exist to allow for wildlife passage. Three crossing structures are recommended across the westbound lanes to improve connectivity for wildlife- two underpasses and what could be Colorado’s first wildlife overpass on I-70. A diversity of crossing structures will ensure suitable crossing opportunities for a larger variety of species.

A feasibility study, completed in the Fall of 2020 by Wood Engineering, was the first step to realizing this vision. This study developed and evaluated preliminary engineering designs for each crossing structure location and resulted in a detailed wildlife crossing system for East Vail Pass.

The Vail Pass Wildlife Byway protects one the most intact and important habitats for many wildlife species along the mountain corridors but wildlife movement and habitat is at risk due to the increasing traffic.

Join Us in the Field

Citizen Science Monitoring

Wildlife Monitoring

with Citizen science

Wildlife monitoring is an essential step in assessing how effective wildlife crossing structures are in restoring wildlife movement corridors. Citizen scientists have been helping monitor wildlife using remote triggered cameras along East Vail Pass since 2015. Nearly every species of wildlife found in Colorado’s high mountains has been documented using habitat in the Vail Pass Wildlife Byway.

Moose seen on wildlife camera at Vail Pass

Canada lynx seen on wildlife camera at Vail Pass

Black bear seen on wildlife camera at Vail Pass

Mountain lion seen on wildlife camera at Vail Pass

Citizen science volunteers checking wildlife cameras at Vail Pass

Black bear seen on wildlife camera at Vail Pass

Mule deer seen on wildlife camera at Vail Pass

Mule deer fawn seen on wildlife camera at Vail Pass

Elk cow and calf seen on wildlife camera at Vail Pass

Citizen Science monitoring is brought to you by our partners, Rocky Mountain Wild and Denver Zoo

Tour East Vail Pass 

Your Help is Critical

Your contribution today will help implement the East Vail Pass Wildlife Crossings and show that this project has wide community support.

Our Partners & Supporters

Summit Eagle Wilderness Alliance logo