The student pilot reported that she was returning to her home airport after being discontinued from her private pilot practical test. Upon departure and initial climb, she maneuvered the airplane into a valley and proceeded to attempt a climb over a ridge that was approximately 1,500 feet higher than the departure airport elevation. The student pilot stated that she knew as soon as she flew into the valley, the airplane was not going to be able to climb over the ridge, and that she was unable to turn the airplane around. She added that she performed a "controlled" crash into the trees. Examination of the airplane revealed substantial damage to the fuselage and to both wings. The student pilot reported no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation.