Did you leave your water filter behind at Indian Rock Arch?
If so we found it. New and expensive looking water filter system found sitting on a rock close to the natural arch. We lunched there on Saturday May 12 and asked everybody coming and going if they left it behind, but nobody had. Discussed for a long time whether to leave it or turn it in to lost and found. Decided on the latter and turned it in to the Wilderness Center in the Valley on Sunday. So if it is yours give them a call to claim it.
PS. Given last weeks discussion regarding water treatment methods it is interesting that I was the one to find this.