What museum is N626BL hanging in? I didn't know anyone other than the Smithsonian had a Blackbird...
As far as I know, every surviving SR-71 and A-12 Blackbird is preserved in a museum. The one you mentioned should be the Museum of Flight in Seattle. The wikipedia pages have their disposition, but for convenience:
Serial number, model, location.
60-6924 A-12 Air Force Flight Test Center Museum Annex, Blackbird Airpark, at Plant 42, Palmdale, California
60-6925 A-12 Intrepid Sea-Air-Space Museum, parked on the deck of the aircraft carrier USS Intrepid, New York City
60-6927 A-12 trainer California Science Center in Los Angeles, California.
60-6930 A-12 U.S. Space and Rocket Center, Huntsville, Alabama
60-6931 A-12 CIA headquarters, Langley, Virginia
60-6933 A-12 San Diego Air & Space Museum, Balboa Park, San Diego, California
60-6937 A-12 Southern Museum of Flight, Birmingham, Alabama
60-6938 A-12 Battleship Memorial Park (USS Alabama), Mobile, Alabama
60-6940 A-12 Museum of Flight, Seattle, Washington
60-6935 YF-12A National Museum of the U.S. Air Force, Wright-Patterson AFB, Dayton, Ohio
61-7951 SR-71A Pima Air & Space Museum, Tucson, Arizona
61-7955 SR-71A Air Force Flight Test Center Museum, Edwards Air Force Base, California
61-7956 SR-71B Air Zoo, Kalamazoo, Michigan
61-7958 SR-71A Museum of Aviation, Robins Air Force Base, Warner Robins, Georgia
61-7959 SR-71A Air Force Armament Museum, Eglin Air Force Base, Florida
61-7960 SR-71A Castle Air Museum at the former Castle Air Force Base, Atwater, California
61-7961 SR-71A Cosmosphere, Hutchinson, Kansas
61-7962 SR-71A American Air Museum in Britain, Imperial War Museum Duxford, Cambridgeshire, England
61-7963 SR-71A Beale Air Force Base, Marysville, California
61-7964 SR-71A Strategic Air Command & Aerospace Museum, Ashland, Nebraska
61-7967 SR-71A Barksdale Air Force Base, Bossier City, Louisiana
61-7968 SR-71A Science Museum of Virginia, Richmond, Virginia
61-7971 SR-71A Evergreen Aviation Museum, McMinnville, Oregon
61-7972 SR-71A Smithsonian Institution Steven F. Udvar-Hazy Center, Washington Dulles International Airport, Chantilly, Virginia
61-7973 SR-71A Blackbird Airpark, Air Force Plant 42, Palmdale, California
61-7975 SR-71A March Field Air Museum, March Air Reserve Base (former March AFB), Riverside, California
61-7976 SR-71A National Museum of the United States Air Force, Wright-Patterson Air Force Base, near Dayton, Ohio
61-7977 SR-71A Lost, 10 October 1968. Cockpit section survived and located at the Seattle Museum of Flight
61-7979 SR-71A Lackland Air Force Base, San Antonio, Texas
61-7980 SR-71A Armstrong Flight Research Center, Edwards Air Force Base, California
61-7981 SR-71C Hill Aerospace Museum, Hill Air Force Base, Ogden, Utah (formerly YF-12A 60-6934)