Balcom runs 90-miles a week on the treadmill while working as a mechanical engineer for the Navy. He's coach by GB Olympian Andrew Lemoncello.
Jeffery Eggleston won the half in 64:40.
Mebrahtu ran 4:16 to Lemoncello's 4:18. Diane Nukuri-Johnson won the women's race in 4:56.
Andrew Lemoncello won the men's race in 45:49 over Nick Hilton (45:56).