• Riverside Astronomical Society
  • Cecil’s Rocks
  • Photonic Cleaning
  • Mare Meteoritics
  • Astro Parts
  • OC Telescopes
  • Carina Software (Mathis Instruments)
  • Sue G’s Jewelry
  • Woodland Hills Photo
  • InfiniTees
  • WAA
  • LAAS
  • IOTA (Internt’l Occultation Timing Assoc.)
  • Gems a Plenty

RTMC Expo Complete Information


This year’s annual RTMC Astronomy Expo will take place from Thursday, September 19th through Sunday, September 22nd. It will be held at YMCA Camp Oakes, five miles southeast of Big Bear City, California.

RTMC Expo Registration


Pre-registration is available from May 20th to August 31st. After August 31st, you may register on-site at premium prices. You may pre-register using a printed registration form and mailing a check or register on-line and pay with Paypal.

Commercial Exhibitors, Vendors & Clubs


Vendors include any business, club, organization or Individual who wishes to set up a booth and sell any commercial items or services. Clubs can set up a booth for free if they are not selling anything.