Physical performance declines with age, even in exercising, healthy individuals without major illnesses or orthopedic issues. The rate of performance decline is often reported to accelerate after the age of 70 years, but almost no data are available on performance in the fittest oldest-old. To assess their rate of decline in performance, the biggest data set of track and field athletes aged ≥80 years (1567 results) ever published was generated for different disciplines from German Athletics Federations including 1997-2019. Performance at age 80 years of athletes still participating at age 85 years was compared with those who discontinued. Only 1 of every 22 athletes competing at age 80 years still competed at age 90 years. The performance decline was more than three times as steep in athletes aged ≥80 years (on average 1.62%/year, men: 100 m, R = 0.31, p < 0.001; 200 m, R = 0.17, p = 0.037; long jump, R = -0.37, p < 0.001; shot put, R = -0.32, p < 0.001; discus, R = -0.34, p < 0.001; javelin, R = -0.43, p < 0.001; women: shot put, R = -0.24, p = 0.017; discus, R = -0.33, p = 0.010) compared with athletes aged 30-69 years (0.46%/year) and accelerated at an average of 67 years. This accelerated decline was most pronounced in the sprint disciplines and lowest in the throws. Performance at age 80 years was similar in athletes still participating at age 85 years to those who discontinued, and the variability in results was decreased after age 90 years. In conclusion, physical performance declines more than three times as fast after around the age of 67 years compared with before. This was particularly the case for sprinting but was not a result of dropout of poorer performing athletes.