The Furnace Creek 508 ultramarathon bicycle race was first contested in 1990.
          509
  50 + 9 = 59
  50 * 9 = 450
              509 TOTAL
511: dial in the Bay Area for transportation information
The Mac512 is an early predecessor to todays Macs.
Dog Friend #513, a boxer named Quadra
514 Productions - A Montreal based promotions corporation.
515 - the area code in Iowa
516 Soundstage promotes itself as “the premiere All Ages venue in Shreveport”. Actually, a premiere is a debut – the synonym for “best” is premier.
Levi’s 517 Red Tab Jeans
5:18 A.M.
Two hours and 42 minutes before I get to go home.
[url\www.the519.org]The 519 Community Centre
Oops. Should have been The 519 Community Centre. :smack:
All Points Nursery, 520 Tennant Avenue, Morgan Hill, California
          521
  521 is the sum of 2 squares = 11[sup]2[/sup] + 20[sup]2[/sup]
  521 = 121 + 400
          522
  522 = 2*9 * 29
Room 523, a “mix disc” put together by one Bobzilla
Oops. That should have been ECON 524: The History of Economic Thought