Are you on the mountain overlooking the Eisenhower Tunnel?
I think the Dillon Reservoir is just west of where the highway exits the Eisenhower Tunnel
According to waymarking:
The Eisenhower Memorial Tunnel is located approximately sixty miles west of Denver, Colorado on Interstate 70. It is the highest vehicular tunnel in the world, located at an elevation of 11,013 feet at the East Portal and 11,158 feet at the West Portal. The Tunnel traverses through the Continental Divide at an average elevation of 11,112 feet...The Eisenhower-Johnson Memorial Tunnel (EJMT) was, for its time, a groundbreaking feat of engineering planning and design. The construction of I-70 and the EJMT through the Rocky Mountains was a major accomplishment toward the completion of the Interstate Highway System. It was the nation's most expensive highway project up to that point and remains the world's longest (at 1.7 miles) and highest (over 11,000 feet) underground thoroughfare. The EJMT stands as one of the great engineering achievements of 20th century highway design.
Here's standing on a peak overlooking the Dillon Reservoir with the town of Frisco visible down on the reservoir.
![](http://alumni.indiana.edu/chapters/denver/images/photo2004_8.jpg)