This weekend, history buffs will gather in San Francisco to commemorate a little-known slice of the state's past. They'll travel from the city's old Army base, the Presidio, to Yosemite National Park. It's a sped-up version of a trek made to the Sierras more than a century ago by black Army troops known as Buffalo Soldiers. Event organizers are focusing on a chapter of the past to encourage more African-Americans to visit national parks now.
Retracing Buffalo Soldiers' Trek to Yosemite
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