Both Soapstone Prairie Natural Area and Red Mountain Open Space have closed for the season. Soapstone Prairie Natural Area, managed by Fort Collins Natural Areas and Red Mountain Open Space, managed by Larimer County close annually from Dec 1st until Feb 28th due to “sensitive wintering range for large mammals and low recreational opportunities.”
Be sure to check with the city and county for reopening information as it is weather dependant.
City of Fort Collins:http://www.fcgov.com/naturalareas/finder/soapstone
Larimer County: https://www.larimer.org/parks/red_mountain.cfm