Background
A commercial pilot was asked to tow a sailplane that had made a precautionary landing after losing lift. The sailplane pilot contacted the tow plane company for assistance. The tow pilot landed in the open field to pick up the glider.
Pre-Takeoff Assessment
Both pilots paced off a distance of approximately 15/1,600 feet. The tow pilot estimated this distance would be sufficient for takeoff at an elevation of 5,300 feet mean sea level (msl). However, the density altitude was calculated to be about 7,903 feet msl, significantly higher than the field elevation.
The Event
During the takeoff climb, the tow plane collided with a fence. The sailplane pilot released from the tow line, overflew the tow plane by about 2 to 4 feet, and then collided with another fence.
Outcome
No further details about damage or injuries were provided in the source.