Hello. This cache is located in Oak Knoll Park, which is just within the borders of Clayton, Missouri. There used to be a cache in this general area that has since been archived. I think it's a nice little area for a cache, so I'm hoping to make an unofficial replacement here.
If you stand at the water fountain and look southeast, you should see a mulch path. The path leads you through a nice little trail, no longer than a minute or so to walk through. It has some sculptures and foliage, and I only discovered this path recently, and I’m at this lake all the time.
The park is open from 6am to 10pm. The cache is very much obtainable at night. This cache is located near a dog-accessible water fountain, so feel free to bring yours along. (I believe the fountain is turned on between April 1 and October 31). I believe this cache should be wheelchair-accessible to anyone who is able to reach a little bit.