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- Cottonwood at San Pedro Riparian National Conservation Area (southern Arizona) beginning to change color, September 24, 2011.
- Fall color in Arizona includes more than trees changing.Grasshopper at San Pedro Riparian National Conservation Area, September 24, 2011
- Aspen beginning to change on the Kachina Trail, Flagstaff, Arizona, on October 1, 2011
- Aspen on Aspen Nature Loop, Snowbowl Road, Flagstaff, Arizona, on October 1, 2011.
- Aspen leaf with water droplets from recent rain, Kachina Trail, Flagstaff, Arizona, on October 1, 2011.
- Fall color in Arizona includes more than trees changing.A lupine continues to bloom in spite of nearby patches of snow on the Kachina Trail, Flagstaff, AZ, on October 1, 2011.
- Aspen leaf on Kachina Trail, Flagstaff, AZ on October 1, 2011.
- Fall color in Arizona includes more than trees changing. Kachina Trail, Flagstaff, AZ on October 1, 2011.
- Aspen on the Aspen Nature Loop, Flagstaff, AZ on October 1, 2011.
- The aspen were still mostly green on the Kachina Trail on October 1, 2011, but the ferns in this meadow provide some autumn color.
- Sunflowers at the McGuireville Rest Area south of Flagstaff, October 1, 2011.
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Cottonwood at San Pedro Riparian National Conservation Area (southern Arizona) beginning to change color, September 24, 2011. Credit: Photos by Gretchen Mominee
