Probably the event that gains the Striders the most attention every year is the Clydes 10K race. This race has been an April fixture in Columbia for over 30 years. Hundreds of runners of all levels start near the walkway over Little Patuxent Parkway in Town Center and wind their way through western Columbia and back to the starting line. In the Fall the Metric Marathon is a leisurely 26.2K (16.3 mile) run from Columbia to Ellicott City and back that tests the more committed runners. I am not sure if the course is the same but the one I remember had a number of hills in the first 8 miles and then it was mostly level and downhill the second 8 miles.
All Fruit Relay that has teams passing off a fruit on each leg of the race. I can attest that a starfruit becomes mushy to hold after a lap or two!