I guess I missed the memo.
http://www.pe.com/2017/11/03/anza-borrego-desert-visitor-center-gets-10-fee-fridays-through-sundays-and-holidays/
https://www.parks.ca.gov/?page_id=638
I am not sure how this works. I am assuming the fee must be paid at the Visitor Center, but the park has many Entrances and Exits. Anyone have any more information on this?
This does not affect Bagster's Rides midweek.
S