Mosca Pass Trail is a roundtrip hike that follows a small creek through aspen and evergreen forests to Mosca Pass—elevation —in the Sangre de Cristo Range. American Indians and early settlers used this route for travel between the San Luis Valley and the Wet Mountain Valley to the east. Several trails located in the northeastern section of the park lead to alpine lakes high in the mountains. A trail to Medano Lake and the summit of Mount Herard is located off Medano Pass Road. A trail along Sand Creek leads to the Sand Creek Lakes and Music Pass—elevation —with a view of the Upper Sand Creek basin. Spur trails along Sand Creek lead to the four alpine lakes which feed the creek, and to several peaks above the basin. The Sand Ramp Trail traverses between the dunefield and the mountains, connecting the park's campground to Medano Pass Road (follow the road up to Medano Lake and Pass), as well as the base of the Sand Creek Trail. Most of the park's grasslands, shrublands and wetlands have no established trails but are generally open to hiking. The Nature Conservancy's Medano Ranch property may only be visited on a guided tour. A fence surrounds the property to contain the Conservancy's bison herd and demarcate the boundaries.