Is this spot free?

Parking is $5, but so worth it!

Parking increased to $6. Annual pass available, too.

There's a parking fee, requested donation, but otherwise free.

There is also a $5 parking fee that can be paid at an automated kiosk, at the booth when entering the park during weekdays, or at the visitor center. Visitor center was cash only when I visited a couple months ago.

Yes

Free admission. There’s a requested $5 voluntary donation per person - you can contribute in the Nature Center. (FYI, They were requiring masks indoors for everyone when we were there in early March, 2022.)