the marine corps historic half (mchh), held in fredericksburg, va, takes participants on a journey from the retail hub of central park through historic downtown streets, up hospital hill, and back to waiting marines at the finish line. held annually in may and open to ages 10 and up, the event boasts a field of 8,000 runners. the historic half also offers the semper 5ive, a five mile event open to 2,000 participants. new in 2017 is the devil dog double. runners competing in this challenge will complete both the semper 5ive and the historic half on sunday, may 21. all events finish at the fredericksburg expo and conference center with the semper 5ive starting in downtown fredericksburg.