The pilot's decision to conduct low altitude flight at a high density altitude and into a box canyon, which resulted in the airplane colliding with rising terrain when its climb capability was exceeded.

THE FAILURE OF THE LOCAL CONTROLLER TO PROVIDE ADEQUATE TRAFFIC ADVISORIES TO N7510H, THE LOCAL CONTROLLER'S IMPROPER CLEARANCE TO N7510H TO DESCEND THROUGH THE TRAFFIC PATTERN, AND THE FAILURE OF THE PILOTS OF BOTH AIRCRAFT TO SEE AND AVOID EACH OTHER. FACTORS WHICH CONTRIBUTED TO THE ACCIDENT WERE THE LOCAL CONTROLLER'S WORKLOAD AND THE EFFECT OF SUNGLARE ON THE PILOT OF N48977.