Tom Sawyer’s Trial by Trail, a 10K trail race, starts at 8 a.m. Saturday, Oct. 17, at Sodalis Nature Preserve, 819 Ely St. in Hannibal. The course mixes technical single track, wide dirt trail and about 25% paved trail, with roughly 900 feet of climbing, and the listing says it suits experienced trail runners and beginners. There is no age limit and the race has a three-hour cutoff. Overall male and female winners receive a $100 cash prize.

Registration is through UltraSignup, linked from the listing. Questions can go to organizer Scott Bridgeman at 573-248-7191.

Source: Visit Hannibal events calendar