Philip S. Miller Park: Catch the Last Light on Challenge Hill
Trade a packed party for a brisk outdoor reset at Philip S. Miller Park. Its trails offer a different side of Castle Rock, with eight miles of native-surface paths and a one-mile paved accessible loop. For a workout and wide views, climb the 200-step Challenge Hill.
Plan this for the afternoon: the sun sets around 4:45 p.m. on December 31, and winter trails can be snowy or icy. The park's listed hours run until 11 p.m., but that is not a reason to start a dark, icy hike late. Park restrooms are listed as open from 7 a.m. to 7 p.m. in winter. Check trail conditions before heading out.