Objective: The objective was to study the effects of age, education, and gender on Trail Making Test Parts A & B (TMT A&B) in a large sample of “non-demented” older adults. Method: TMT A & B was administered to 1051 “normal” older adults (age 50-89) as part of a comprehensive neuropsychological battery in a study of cognitive aging. The mean age for the entire sample was 67.90 years, mean MMSE = 29.0, and mean education = 14.4 years. There were 179 participants in their 50s, 431 in their 60s, 339 in their 70s, and 102 in their 80s. Mean ages for the four age groups were 56, 65, 74, and 83 years and mean education was 15.1, 14.4, 14.2, 14.1 years. Results: The mean (+/- SD) TMT A & B time scores and error scores for the entire sample (age 50-89) were 39.22 (15.00) seconds and 0.14 (0.43) errors for TMT A and 88.87 (39.19) seconds and 0.54 (1.20) errors for TMT B. Slower mean TMT A & B scores were found with successively older age groups. Faster mean TMT A&B time scores were found with successively increasing educational levels (<12, =12, >12 years; n = 62, 328, 661). Females were somewhat faster on average than males on both Trails A and B. Conclusion: Significantly slower mean TMT A & B scores were found with successively older age groups and decreasing educational levels and females were somewhat faster on average than males on both Trails A and B.