Smithsonian Astrophysical Observatory|
Fred Lawrence Whipple Observatory
670 Mt. Hopkins Rd.
Take I-19 south, past Green Valley to exit 56 (Canoa). At the bottom of the exit ramp, turn left and drive east to the East Frontage Road. Turn right on the frontage road and drive 3 miles to Elephant Head Road. Turn left and drive east, crossing the bridge over the Santa Cruz River and crossing the railroad tracks immediately east of the bridge. One mile past these tracks, turn right on Mount Hopkins Road. Drive southeast about 7 miles to the Basecamp.