From Hwy 4 in Antioch
take the Lone Tree exit
Go 1.6 miles South on Lone Tree
Turn right on Golf Course Rd.
0.7 miles on Golf Course Rd.
Turn right onto Frederickson Ln.
Go 1.4 ml.
Turn right into the Contra Loma
Regional Park access road.
Just inside the park gate, go right to the field.

see below this map for a closeup

see below this map for a closeup