Riverside Astronomical Society—Outreach, star parties, dark sky site, and you!

GMARS: Goat Mountain Astronomical Research Station

Driving Directions

If you're thinking about attending a star party in the Inland Empire, the Riverside Astronomical Society's dark sky site, GMARS, is the spot for you. Where exactly is GMARS, you ask? Getting here is straight-forward and fairly easy. You can use Google Maps to see the location and to enter your starting location for driving directions. All roads are paved except for the last 2 miles to the property. But the dirt roads are fairly well-grated and shouldn't present any problems for normal passenger cars. Be careful if using a GPS device to get here as the street signs don't always match up with the map labels.

If coming from the LA, San Gabriel Valley, Pomona Valley, Riverside, or San Bernardino areas:


Overview map of GMARS location.

  1. Take I-10 EAST to Hwy 62 and go NORTH. Continue on Hwy 62 for about 22 miles.

    NOTES: If coming from the west, Hwy 62 splits off I-10 shortly after Hwy 111, which is the exit for Palm Springs.

  2. Take Hwy 247 (Old Woman Springs Road) NORTH (this is a LEFT turn). Continue on 247 for about 10 miles.

    NOTES: While on HWY 62, you'll pass through Morongo Valley and you'll eventually arrive in the town of Yucca Valley. There are signs for Highway 247 but only as you approach the intersection so keep your eyes peeled for it. Look for the signs for Hwy 247 or Old Woman Springs Road, and note that there's an auto parts store and a Chevron gas station on the left side of the road where you need to turn.

  3. Turn RIGHT on Reche Road. Continue on Reche Road for about 3 miles (see photo).

    NOTES: At the turn, there is a sign for Reche Road, which also notes that Landers is 3 miles from there. After about 2.5 miles you will pass the Landers Post Office (which is on the right side of the road).

Here's where it gets a little tricky...


Aerial view of GMARS from WNW.

  1. Shortly after passing the Landers Post Office (see photo), turn LEFT on Gibralter Road (see photo). It's dirt roads from here on out. What's tricky about turning left onto a dirt road? Most maps have Gibralter Road labeled as Becker Road. In terms of street or road names, most maps and GPS devices can't be trusted from this point. So, once you pass the post office, be sure to look at the street signs on the left side of the road and go by their labels instead of the labels on your map or GPS device. Continue down Gibralter Road for about 1.5 miles.

  2. Turn RIGHT on Botkin Road. You should see an RAS sign on the south east corner of the intersection of Gibralter and Botkin Roads (see photo). Continue on Botkin Road for about 1/10th of a mile.

  3. Driving directions to GMARS - final approach
    Final approach to GMARS with alternate roads.
  4. Turn LEFT into the RAS GMARS "driveway." You're here!

If coming from the Antelope Valley, Apple Valley, Hysperia, or Victorville areas:

  1. Take Hwy 18 out of Victorville going EAST.
  2. Continue on Hwy 18. It'll turn into Hwy 247. Continue EAST. It'll eventually turn toward the south.
  3. Follow the directions from #3 above, but make a LEFT on Reche Road.