This is a California State Park on the western edge of Colusa CA, on the Sacramento River, right where it takes a left turn. Post COVID it is being managed by the City of Colusa rather than the state, and it has a much more mellow feel to it. Anyway ... pre-COVID it wasn't inviting to me. Now it is. Go figure. Bathroom has a key code, shower requires quarters. Over 65 gets $2 off. We are right inside the levee, which is cool. There is a really sketchy trailer park right on the other side of the levee, which is not cool.
In the harbor area. You can see it far below you from 101 in the east side of the bridge over the Noyes River. The "office" is the cashier on the second floor of Silver's at The Wharf across the parking lot. It's also great place to return to for a sunset beer. Very user-friendly place. Upstairs rooms are $10 cheaper, but they were full.
In the style of Inyo Forest campgrounds(*), this one is hard to find(**) and kind of shabby and rough, but it's in a really beautiful location. This one is on Lee Vining Creek, in the aspen/pine forest on top of the glacial till. It's the first campground on CA 120 west of Mono Lake heading up to spectacular Tioga Pass. It's pretty cool. It's very popular with fishermen. (*) Except the Inyo campgrounds around June Lake/Mammoth. They are run by a concessionare. They are a little nicer, cost twice as much, and have three times as many rules. (**) There is an arrow for "camping", but you must turn off the road to see the "Lower Lee Vining" sign.