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Sentinel (foaled 1968) was a Champion South African bred Thoroughbred racehorse. He was bred and raced by the Ellis family from Hartford Stud (now part of ) in Kwazulu Natal and trained by Joe Joseph. He raced from 2 to 6 (1971-1975) years of age. He won 29 and placed in 18 of his 56 starts and earned ZAR207,990. He won a record 26 stakes races and was placed in another 17 stakes races. He won from 1000m to 1600m and won the Cape Flying Championship (now Grade 1) over 1000m in three successive years (1973–75).