Medford’s park is pretty decent, actually.
Ashland & Phoenix parks are both just a hop, skip & roll to the south, but… meh.
Maybe if you burn through your other options; they’re not awful, but not that great either.
Grants Pass park to the north on the 5 is pretty solid as well, as far as transition goes.
Klamath Falls is a bit more of a drive, but big & full of big bowls.
There’s a decent little street scene going on in Ashland too, but it’s a small town, so don’t expect too much from it.
Hope you have fun.