Registration for the 37th Marine Corps Marathon opens to active-duty and reserve service members at noon on Feb. 23 — one week from today.  Sign up during early registration and you’ll get a 15 percent discount, courtesy of GEICO. Service members will pay $78.20 instead of the regular $92. The exclusive registration period will end March 6, and you must register during this period to get the discount.

General registration opens at 3 p.m. on March 7,  so mark your calendars and set an alarm. Last year’s race sold out in 28 hours, so don’t doddle if you’re hoping to run.

Find registration information here. Race day is Sunday, Oct. 28.