From Warrenton, head south on Hwy. 47 until you pass through Marthasville. In a mile or less in the midst of crop fields, you will see Boone Monument Road to the left. Look for signage. Take the left and proceed over the Katy Trail and follow the road which will make a sharp bend to the left and continue on about a quarter mile till you see the signs for the monument. Parking is available on the other side of the road from the monument. Be careful and watch for traffic. Note: This monument is not handicapped accessible.