Here is the reservation link you can use to make online reservations using the group rate for INLAND EMPIRE NAVY BIRTHDAY ROOM BLOCK for only Marriott Riverside at the Convention Center for $123 per night. 

The Marriott is located conveniently across the plaza from the Convention Center.

Hotel Reservation Link

INLAND EMPIRE NAVY BIRTHDAY ROOM BLOCK

The group rate is valid from Oct. 17 to 18, 2015.  The last day to book is Oct. 2, 2015.