June 27, 2011
I'm not a runner, but I sometimes pick up trash I see as I'm riding my bike to work or out for lunch, especially if it's in the road. I saw "bike" mentioned in your description, so I figured I was welcome. I probably won't come to many events, though, as I'm way busy already.
I don't know about "favorite", but the category of trash I most often find myself picking up as I commute by bike to work or out to get lunch is sharp objects like nails and bolts from the side of the road, where bicyclists could run over them and puncture a tire.
I run the Portland Bicycle Commuting Meetup, and am also involved in other bicycle things around Portland and the state. I heard about this from JessG, who is a member of both of our groups.