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Colorado

Sandhill cranes
Sandhill cranes
İRick Kallmeyer
Event: Spring Migration of Sandhill Cranes
Where: San Luis Valley
When: mid-March
Each spring, 22,000 greater sandhill cranes travel along the Rio Grande, stopping in the San Luis Valley before continuing their migration north. These fascinating creatures perform courtship dances and displays at The Nature Conservancy's Medano-Zapata Ranch, the Monte Vista National Wildlife Refuge and San Luis State Park.

Restricted access: to visit Medano-Zapata Ranch, register for a Naturalist Workshop or a guided field trip. Not open for public visitation.
Aiken Canyon Preserve
Aiken Canyon Preserve
İHarold E. Malde
Event: Wildflowers Peaking
Where: Aiken Canyon
When: June
A wide variety of wildflowers burst into color at Aiken Canyon. Visitors can explore this striking canyon and learn about its rich ecological heritage at an innovative visitor's center. More than 100 species inhabit Aiken Canyon.

Open Saturday, Sunday and Monday from sunrise to sunset.
Sandhill cranes
Sandhill cranes
İDonna Ikenberry
Event: Greater Sandhill Cranes Migrating
Where: Yampa River Preserve - Carpenter Ranch
When: First two weeks in September
Hundreds of majestic greater sandhill cranes take flight in the Yampa Valley as they leave their staging grounds to migrate. The Yampa River harbors a remarkable diversity of wildlife, including more than 150 species of birds.

Open to the public.
San Miguel River Preserves
San Miguel River Preserves
İHarold E. Malde
Event: Leaves Peaking
Where: San Miguel River Preserves
When: Early September
The aspen are at their peak, covering the preserve in bright gold, orange and red. One of the few remaining rivers in the west that still functions naturally, the San Miguel features some of the finest riparian habitat in the upper Colorado River Basin.

Open to the public.

For additional information on a particular location, click on the name of the preserve associated with the event or visit the Colorado site.