Exhibit 10.1 PARTICIPATION AGREEMENT (State Lease 19499) This Participation Agreement ("Agreement"), effective as of February 11, 2008 ("Effective Date") is made by and between El Paso E&P Company, L.P. ("El Paso"), Ridgewood Energy Corporation...Participation Agreement • May 15th, 2008 • Ridgewood Energy M Fund LLC • Oil & gas field exploration services • Texas
