The wet rocks were sketchy on the day that I rode (9/10), so I got off and walked the rough spots. I noticed a piece of glass so I picked it up. Then I see more and more and jagged metal strewn on the Red Trail. I picked up as much as I could but didn't have a bag to put all the broken glass and metal shards. Wish I could post a picture of all the glass and metal. I wouldn't have noticed if I hadn't gotten off and walked the trail. Who ever is doing this is an inconsiderate person. Hikers walk their dogs on this trail all the time. I see families with small children enjoying this park and they definitely walk the Red Trail.