The Raptor Alley tour route was designed by “The Nunn Guy” to see most of the raptor species that can be found during the winter in Colorado. The trail originates from the Town of Nunn, perhaps one of the best places to see most common birds of prey and where some 23 species of raptors have been recorded. The tour encompasses many prairie dog towns and high-standing perches for raptors. This area also features Lapland Longspurs mixed in with flocks of Horned Larks in winter months. When driving on county roads, please watch for traffic and only pull over to look for birds in visible, safe locations. Also, be careful pulling onto the shoulder of roads, as many are soft and you could get stuck.
Directions: From I-25: take exit 269-A, CO 14/Mulberry St and go east to the town of Ault. Head north on US Hwy 85/CanAm Hwy to the town of Nunn. The Raptor Alley Route is a series of loops around Nunn and between Nunn and Pierce. First loop: Go east on CR 100, then north on CR 37, then west on CR 102. At CR 31, go south and loop back to CR 100. Second loop: Go east on CR 100, then south on CR 33, then west on CR 90 through Pierce. Note: there's a prairie dog town north on CR 29 that has good viewing. Then continue west on CR 90 to CR 27 and go north back to CR 100. Third loop: Go west on CR 100, then north on CR 19, then east on CR 102, then north on CR 27, and east on CR 120. From CR 120, take US Hwy 85 south back to Nunn or north to Cheyenne, WY.
Dates of Access: Open all year
Hours: Daylight hours
Ownership: Public road
Restrictions: Snowy and muddy road conditions can prohibit travel in certain areas.
Lodging: Hotels in Eaton and Greeley. Camping at Crow Valley Campground.
Handicapped Access: Viewing from car