A unique feature of Colina Mariposa Natural Area is the high butterfly diversity on the eastern ridge, which led to the site name, Colina Mariposa - Spanish for butterfly hill. Bald eagles, turkey vultures, northern harriers, red-tailed hawks, and ferruginous hawks also use the habitat here. Currently, there is no public access to Colina Mariposa, but the future Long View Trail (connecting Fort Collins and Loveland) will traverse the site parallel to Shields Street.
Approximately 1 mile of soft surface trail is accessible only from the adjacent neighborhood. In the future, the Fort Collins/Loveland paved trail is planned to traverse Colina Mariposa parallel to Shields Street.
5:00 a.m. 11:00 p.m.
Neighborhood access only. Colina Mariposa extends south from the intersection of Trilby Road and Shields Street. Colina Mariposa's approximate address is 901 West Trilby Road, Fort Collins.
Events and Activities
- Free educational activities and events in June-October are listed in the Tracks & Trails booklet guide.
- Last minute activity additions, trail recommendations and events offered between November-May are in our free monthly electronic newsletter- sign up in the upper right-hand corner of this page.
- Customized free educational programs at natural areas are available for groups, call the Master Naturalist Program at 970-224-6118 or email c2tlbm5leUBmY2dvdi5jb20=.
- Know before you go safety and recreation information.
- The Holyoke Street Homeowners have adopted this natural area, helping to keep it free of trash and litter. Thank you!
- Plant List for Colina Mariposa Natural Area. Volunteers were critical in making the list possible, thank you! Questions or list additions? Please email Y3N0cm91c2VAZmNnb3YuY29t .
- Fossil Creek Natural Areas Management Plan 2017, pdf