Just for future reference, this information has been "stickied" at the top of the Lost and Found forum since 2009:
Originally Posted by AHRA
Just wanted to let everyone know to check with the Park Office (719)539-7289 in Salida if they lose gear on the Arkansas. We aquire a far amount of equipment each year with out contact info on it.
Colorado State Parks
If the AHRA didn't end up with it I would check with CKS (719-395-9206) and the BV town hall (719-395-8643). Not sure if they have a lost and found, but it wouldn't hurt to call and ask.