Summer Soltice Celebrations and Traditions ~
http://www.religioustolerance.org/summer_solstice.htm
Native Americans: The Natchez tribe in the southern U.S. "worshiped the sun and believed that their ruler was descended from him. Every summer they held a first fruits ceremony." Nobody was allowed to harvest the corn until after the feast.
Males in the Hopi tribe dressed up as Kachinas - the dancing spirits of rain and fertility who were messengers between humanity and the Gods. At Midsummer, the Kachinas were believed to leave the villages to spend the next six months in the mountains, where they were believed to visit the dead underground and hold ceremonies on their behalf.
Native Americans have created countless stone structures linked to equinoxes and solstices. Many are still standing. One was called Calendar One by its modern-day finder. It is in a natural amphitheatre of about 20 acres in size in Vermont. From a stone enclosure in the center of the bowl, one can see a number of vertical rocks and other markers around the edge of the bowl "At the summer solstice, the sun rose at the southern peak of the east ridge and set at a notch at the southern end of the west ridge." The winter solstice and the equinoxes were similarly marked.
The Bighorn Medicine Wheel west of Sheridan, WY is perhaps the most famous of the 40 or more similar "wheels" on the high plains area of the Rocky Mountains. Mostly are located in Canada. At Bighorn, the center of a small cairn, that is external to the main wheel, lines up with the center of the wheel and the sun rising at the summer equinox. Another similar sighting cairn provides a sighting for three dawn-rising stars: Aldebaran, Rigel and Sirius. A third cairn lines up with fourth star: Fomalhaut. The term "medicine wheel" was coined by Europeans; it was a term used to describe anything native that white people didn't understand.