From North Dakota I-29 south to the New Effington exit. Then take Hwy 127 and Hwy 106 west and north through Claire City to Hwy 25. Take Hwy 25 west to 449th Ave (which is on the county line). Take 449th Ave south five miles to 110th St. Turn west on 110th St and the entrance is on the south side of the road.

Alternatively, one heading to Monson Pit from North Dakota could take Hwy 18 south into South Dakota (where is turns to Hwy 25). Continue heading south until Hwy 25 heads west just north of Claire City. Take Hwy 25 west to 449th Ave (which is on the county line). Take 449th Ave south five miles to 110th St. Turn west on 110th St and the entrance is on the south side of the road.