Alta, Colorado is famous for being the first site to leverage Tesla's AC transmission system. This allowed the local mines and mills to convert from coal power which had to be transported 4 miles by mule trains each day.
From historic marker at the Alta Townsite;
The Alta Townsite was the center of mining activity in the Alta-God King area from 1877 to 1948. L.I.Nunn, Nicola Tesla and George Westinghouse worked at this site with the first industrial use of alternating current electriciity. A long distance electric transmission line was completed from the Ames power plant on the San Miguel River below on June 21st 1891. John Wagner operated the Belmont-Wagner mill at this site from 1917 until 1948
WARNING! Hiking and outdoor related sports can be dangerous. Be responsible and prepare for the trip. Study the area you are entering and plan accordingly. Dress for the current and unexpected weather changes. Take plenty of water. Never go alone. Make an itinerary with your plan(s), route(s), destination(s) and expected return time. Give your itinerary to trusted family and/or friends.