Local News Bison Roundup On Rocky Mountain Arsenal Wildlife Refuge December 8, 2015 / 3:32 PM MST / CBS News (credit: CBS) Rocky Mountain Arsenal Wildlife Refuge Bison Roundup (credit: CBS) Rocky Mountain Arsenal Wildlife Refuge Bison Roundup (credit: CBS) Rocky Mountain Arsenal Wildlife Refuge Bison Roundup (credit: CBS) Rocky Mountain Arsenal Wildlife Refuge Bison Roundup (credit: CBS) Rocky Mountain Arsenal Wildlife Refuge Bison Roundup (credit: CBS) Rocky Mountain Arsenal Wildlife Refuge Bison Roundup (credit: CBS) Rocky Mountain Arsenal Wildlife Refuge Bison Roundup (credit: CBS) Rocky Mountain Arsenal Wildlife Refuge Bison Roundup (credit: CBS) Rocky Mountain Arsenal Wildlife Refuge Bison Roundup (credit: CBS) Rocky Mountain Arsenal Wildlife Refuge Bison Roundup (credit: CBS) Rocky Mountain Arsenal Wildlife Refuge Bison Roundup (credit: CBS) Rocky Mountain Arsenal Wildlife Refuge Bison Roundup (credit: CBS) Rocky Mountain Arsenal Wildlife Refuge Bison Roundup (credit: CBS) Rocky Mountain Arsenal Wildlife Refuge Bison Roundup The bison roundup at the Rocky Mountain Arsenal Wildlife Refuge (credit: CBS) Rocky Mountain Arsenal Wildlife Refuge Bison Roundup (credit: CBS)