Hike with geologist Dr. Richard Holm, looking at geologic history of the Rio de Flag in east Flagstaff, just east of Continental and south of I-40, event sponsored by NPS/USFS Interpritive Partnership Program, Flagstaff

Hike with geologist Dr. Richard Holm, looking at geologic history of the Rio de Flag in east Flagstaff, just east of Continental and south of I-40, event sponsored by NPS/USFS Interpritive Partnership Program, Flagstaff