German luger who was the only singles luger to win three consecutive Olympic gold medals (1992, 1994, and 1998). Hackl's cool demeanour and ability to adapt his sled to race conditions forged his reputation as the dominant luger of his time.

Hackl was born and raised in the Bavarian town of Berchtesgaden, just four miles from the Königssee luge course where he trained his entire life. At age 16, he learned metallurgy and began building his own sleds. His Olympic successes took root at the 1988 Winter Games in Calgary, Alberta, Canada, when, despite a glitch in his start, he claimed the silver medal in the singles luge competition. He returned to the Olympics in 1992 at Albertville, France, with polished starts, a refined technique, and an older style of sled. He took first place easily by winning three of the four runs and beating silver medalist Markus Prock (Austria) by 0.3 second in the final standings.

The Albertville finish was an early result in a rivalry between Hackl and Prock that dominated the luge sport in the 1990s. Both Hackl and Prock were excellent sled drivers, but Prock, an exceptionally gifted athlete, used powerful starts (vital in luge competition) to collect 10 World Cup titles between 1987 and 2002, as well as two world championships. Hackl, however, proved to be the better performer in the big races—most notably at the Olympics. He remained the Olympic champion, narrowly defeating Prock by 0.013 second at the 1994 Winter Games in Lillehammer, Norway. At the 1998 Games in Nagano, Japan, Hackl recorded the fastest time on all four runs of the competition and earned his third consecutive gold medal in luge singles. Hackl attempted to win a fourth consecutive gold medal at the 2002 Salt Lake City Games, but he came in second to Armin Zoeggeler of Italy. Prock took the bronze.

Among Hackl's other victories were the singles world championship as well as the World Cup in both 1989 and 1990. He won a third world championship in 1997.