All cars, on the 78, about 2000 yards west of the junction with the 86.
This is the west side of the marsh.
Water streams intermittent, sinking into the sand at one point and appearing some-place else.
This is a less traveled part of the marsh, still watch out for motor vehicles, they may not expect or see you.
Like most marshes this place is seriously infected by Tamerisk/Saltcedar.
An alternative 3 3/4 hour hike A1 is included in the GPX download.
How to get here:
On the 78, about 2000 yards west of the junction with the 86.
Or 0.6 Mile East of the Old Well Wash.