SAN DIEGO -- Authorities released the name Friday of a 60-year-old orthopedic surgeon killed in a solo motorcycle crash on a Mira Mesa thoroughfare.

Jeffrey Marxen of Carmel Valley lost control of his yellow 2005 Honda Gold Wing on a curve while riding to the north in the 11900 block of Black Mountain Road shortly before 10 p.m. Thursday, according to San Diego police and the county Medical Examiner's Office.

The motorcycle hit a curb on the east side of the street, and Marxen, who was wearing a helmet, fell off and tumbled into a metal shroud covering a water line near Mercy Road. He died at the scene, despite the lifesaving efforts of bystanders and medics.