We've got a 12 clay court (har-tru) public park in Asheville, NC. No, play isn't free (was this year due to Covid), but hey......
we have a public clay court facility from March/April-November.
Otherwise, my club (2 locations) has 25 or so clay (har-tru and hydro-court) courts as do several other locations in town
(not as many at the other clubs).
Winter, we play indoor or outdoor hard (we have 10 indoor hardcourts and 10 or so outdoors, we also Host the UNC Asheville
mens and womens teams on the property as they got rid of their on campus courts and some funds have co-mingled to build them a small
6 court facility on club property which is available to all unless they are practicing and/or having matches).
Brevard NC has two INDOOR clay courts...... It's just down the road. They don't get re-done enough since they don't see the winter freeze.....