San Juan Creek Cleanup. My 6 year old son and I went down into the generally dry San Juan (Runoff) Creek bed, and bagged (2) 32 gallon bags of trash! My son claimed, "Dad, this is actually really fun!" We were inspired by the fact that we picked up trash right before the rain was to sweep it right down to Doheny State Beach. We were constantly cheered on by passersby on the San Juan Creek bike path!