The pilot reported that after parachutists (skydivers) jumped from 13,000 feet, he returned to the airport. While on base leg for landing, two radio-controlled model airplanes were observed flying near the approach end of the runway. The model airplanes swung wide and blocked the first 2,000 feet of the approach end of the runway; thus, moving the available touchdown zone closer to the departure end of the runway.

Read the NTSB report…