Grand Junction is located in Mesa County, here in Colorado. Grand Junction may not be the most populous city in Colorado, but it is the most populous city on the Western Slope with over 60,000 people. A visit to the city of Grand Junction may bring you to the Colorado National Monument, The Museum of the West with prehistoric pottery. A uranium mine exhibit, and 19th century firearms that tell the history of the region, or you can visit one of the 27 wineries in the Grand Valley. There is also plenty of opportunity for outdoor activities, from adventurous hikes and bike rides to relaxing floats down the river or picnics with great views.