Denver International Airport, (IATA: DEN, ICAO: KDEN). Commonly referred to as DIA. It is located about 20 miles to the east of downtown Denver. Frontier Airlines, United Airlines, and Southwest Airlines all maintain hubs at the airport in Concourses A, B, and C respectively. Most other major domestic carriers also have service here.
Grand Junction Regional Airport, (IATA: GJT, ICAO: KGJT), otherwise known as Walker Field, is served by six airlines with nonstop service to Dallas/Fort Worth, Denver, Salt Lake City, Phoenix, and Las Vegas. Some service is seasonal. For private pilots, it is also possible to fly your small plane into the airport and leave it while you tour the area. Most hotels on Horizon Drive offer shuttle service from the airport. Taxi service is also available at the airport.
For extreme mountain bikers, it's possible to follow the Kokopelli Trail from Moab, Utah, then join up with the trail system of the monument. This is a five or six day, strenuous excursion where you must pack in your own food, shelter and water.
There's another north-south running slick rock trail that fat tire enthusiasts can follow into town:
Tabeguache Trail, ☎ +1-970-244-3000, . Trail crosses public land for 142 miles connecting Montrose and Grand Junction. The Tabeguache Trail begins in Shavano Valley and weaves through the canyons, mesas and highlands of the Uncompahgre Plateau before ending in "No Thoroughfare Canyon," a few miles west of Grand Junction.edit