By plane
The closest major airport is DIA in Denver, about 90 miles away. Shuttle service to Estes can be obtained see (http://www.estesparkshuttle.com/ or (http://www.estesparklimo....).
There are small airports in Boulder, Longmont and Loveland/Fort Collins.
By car
4 main routes:
West from Loveland, CO via US-34, approximately 30 miles
Northwest from Lyons, CO via US-36 approximately 25 miles
North from Golden / Blackhawk / Central City / Boulder through Allenspark, CO via CO-7
East from Grand Lake, CO via US-34 over Trail Ridge Road through Rocky Mountain National Park. This route is seasonal it usually opens at the end of May and closes sometime in October depending on the snowfall and you will have to pay an entrance fee to get through the National Park.