Bluestem (prairie grass) with a quartzite outcrop in the background inside Blue Mounds State Park, 1998.

Shadows of visitors to Blue Mounds Quarry, 1995.

Bison jump site at Blue Mounds State Park, 1995.

Sunrise during the autumnal equinox in Blue Mounds State Park, 1990.

Blue grosbeak, April 27, 2011. Photograph by Wikimedia Commons user Dan Pancamo.

Sioux quartzite cliff in Blue Mounds State Park, 2007.

Blue Mounds State Park, Upper Dam, ca. 1990s.

Bison herd, 2014. From the photograph collection of the Minnesota Department of Natural Resources.

Mound hiking trail, 2014. From the photograph collection of the Minnesota Department of Natural Resources.

Frozen prairie with distant bison herd, 2014. From the photograph collection of the Minnesota Department of Natural Resources.