I really hate to see trash along the trails and rivers too. For some reason, it seems to always be Bud cans too...?
I did litter along the creek at Tremont once. I had one of those plastic containers with the lid on them from LRO that contained a bunch of flies I purchased that morning. Being somewhat lazy and in a hurry, instead of taking the flies out and putting them in my fly box, I put the little plastic container in the upper pocket of my vest.
I walked down the hillside to the stream, waded out to start fishing and realized my vest pocket was unzipped. The container was nowhere to be found. I still have no idea and sincerely hoped some other fisherman found it and caught a large fish with the flies. At least then they would have been put to good use.