6 1/2 ft minimum
About 6 feet
The stadion race (a 600 feet long foot race).
In Olympic Diving the platform is 10 meters high or 32.8084 feet tall.Springboard diving is 3 meters high or 9.84252 feet tall.
Following the 1932 Games in Los Angeles, the men's high jump Olympic record was 1.98 meters (6 feet, 6 inches) by Harold Osborn of the United States at the 1924 Games in Paris.
From Wikipieda... An Olympic sized swimming pool (first used at the 1924 Olympics) is a pool that meets FINA's additional standards for the Olympic Games and for world championship events. It must be 50 m (~164 feet) in length by 25 m (~82 feet) wide, divided into eight lanes of 2.5 m (~8.2 feet) each plus two areas of 2.5 m (~8.2 feet) at each side of the pool. The water must be kept at 25-28°C (77-82.4°F) and the lighting level at greater than 1500 lux.
Charles Austin won gold in high jump at the 1996 Games in Atlanta with a jump of 2.39 meters (7 feet, 10 1/10 inches). It stands today as an Olympic record.
One length of an Olympic sized pool is 50 meters.
The women's Olympic record in shot put is 22.41 meters (73 feet, 6 1/4 inches) by Ilona Slupianek of East Germany at the 1980 Summer Olympics in Moscow. The men's Olympic record in shot put was set by Ulk Timmermann of East Germany at the 1988 Games in Seoul at a distance of 22.47 meters (73 feet, 8 5/8 inches).
The answer is 10 feet, about 3 feet deeper than most Olympic Pools.