Thus you should plan your return flight on June 20th or later. We begin the course in Dillon. Field Conditions and Recommended Gear Field areas are on public land between 5000 and 7000 feet elevation. Road access is good. Most students adapt quickly to the mountain air.
Weather can vary from cold and rainy to hot and dry.
This allows you to adapt to the conditions as they change. We go out every scheduled day, irrespective of the weather. Wear a hat and be careful to apply sunscreen for skin protection at the high elevations. And bring and drink a lot of water. The conditions can be unexpectedly dehydrating.