Kathryn Grahn, who is 87 years old, says her grandmother survived tuberculosis, drove a mule team on a frontier mail route and staked out her claim to land in Prowers County that is now the 5,000 acre Rocking 7K Ranch, in the southeast corner of the state. The ranch and others will receive a Centennial Farm designation from History Colorado at the State Fair in Pueblo on Friday.

Homesteaders George and Alzada Karn in 1898