From the Beltway (I-495): take Exit 11A toward Upper Marlboro (MD Hwy 4).  Stay on Hwy 4 for about 8 miles. Just past the Equestrian Center take the Rt. 301 exit going South. Stay on Rt. 301 for about 1.5 miles and make a left onto Croom Station Rd. Stay on Croom Station Rd for about 1.6 miles to the dead-end and turn left onto Croom Rd. Stay on Croom Rd for 1.5 miles and turn left onto Croom Airport Rd. which will take you about 2 miles to the park entrance.