Marathon Oil Corporation is a United States-based oil and natural gas exploration and production company. Principal exploration activities are in the United States, Norway, Equatorial Guinea, Angola and Canada. Principal development activities are in the United States, the United Kingdom, Norway, Equatorial Guinea, and Gabon. Marathon's headquarters facility is the Marathon Oil Tower in Houston, Texas.
The Oklahoma City Memorial Marathon is an event commemorating the Oklahoma City bombing. Started in 2011, the annual event has grown to over 10,000 participants and has been called one of the "12 Must Run Marathons" by Runner's World Magazine.