STUDENT GLIDER PLT MISJUDGED; LANDED SHORT OF THE GLIDER PORT IN THE TREES ON FINAL APCH WITH LITTLE DAMAGE AND NO INJURY.

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THE PROB AROSE FROM A LACK OF CONCENTRATION ON MY POS IN THE LNDG PATTERN. RELATIVE TO ALT. I FORMED A LARGER THAN NORMAL PATTERN USING A SHALLOW ANGLE OF RELATION TO MY LNDG SITE -- THIS PATTERN WAS TOO LONG ON DOWNWIND BASE AND FINAL. EVEN AFTER TURNING TO FINAL A FIXED AND STABLE AIM POINT WAS ESTABLISHED. MY GLIDE PATH WAS SEVERELY AFFECTED BY TURB THEN SINK THUS REDUCING MY ABILITY TO CLR A TREE LINE PRIOR TO THE THRESHOLD OF THE LNDG STRIP. ALTERNATE FIELDS AND OFF SITES WERE NOT AVAILABLE AT THAT ALT (BELOW 100 FT). MY CHOICES CONSISTED OF: 1) TRANSFER SPD TO GAIN ALT TO CLR TREE LINE. 2) TO LAND STRAIGHT AHEAD INTO TREE TOPS. I CHOSE NOT TO TRANSFER SPD TO GAIN ALT AS THE RISK OF A STALL WAS IMMINENT AND LOSS OF CTL WAS INEVITABLE; THEREBY RISKING AN UNCTLABLE STALL WITH A 10 MPH HEADWIND FROM AN ALT OF APPROX 100 FT AGL. THIS TREE LINE IS APPROX 200 FT IN WIDTH; 600 FT IN LENGTH AND 70-80 FT IN HT. I DID CHOOSE TO LAND STRAIGHT AHEAD INTO TREE TOPS. I REDUCED MY SPD AND GENTLY STALLED THE PLANE INTO THE TREE TOPS. VERY LITTLE DAMAGE WAS DONE TO THE PLANE. I RECEIVED NO PHYSICAL OR MENTAL INJURY. THE LNDG WAS CTLED AND PREDICTABLE. MY LOSS OF CRITICAL ALT NECESSARY FOR FINAL GLIDE TO LNDG WAS LOST IN A MATTER OF SECONDS. TURB AND SINK IN WIND AND CLOSE TO OBSTRUCTIONS MADE FOR VERY FEW ACCEPTABLE REMEDIAL ACTIONS. I CHOSE MY ACTION QUICKLY WITHOUT RESERVE AS THE SAFEST CTLABLE COURSE TO TAKE. IN THE FUTURE I WILL BE WELL RESTED; NOT RUSHING TO CRAM SEVERAL HRS OF FLYING INTO A BUSY WORK SCHEDULE. I'M GOING TO TAKE MORE PATTERN RELATED INSTRUCTION FROM A CFIG (GLIDER) AND RECEIVE AS MUCH INFO AS POSSIBLE RELATIVE TO THE PROPER FORMATION OF PATTERN AND LNDG PROCS.