The Battle of Palo Alto, which took place on May 8, 1846, was the first battle of the two-year conflict known as the US/Mexican War. The site was designated as a National Historic Landmark in 1960 and a National Historic Site in 1978. Today, the 3,400-acre battlefield is the only unit of the National Park Service that has a primary focus on the US/Mexican War.
Visitors to Palo Alto will find a visitors' center full of exhibits dedicated to the US/Mexican War, a battlefield overlook station and walking trail. The park is open from 8 a.m. to 5 p.m. daily except Thanksgiving, Christmas and New Year's Day.