[1] The park is located approximately 15 miles (24 km) northwest of St George.

The reservoir dam was constructed in 1970 for irrigation water and flood control.

[1] Hamblin was a Mormon pioneer born in Ohio who settled in the area in 1857.

[2] The county road to the park is the Old Spanish Trail used by horsemen and raiders from Santa Fe, New Mexico to Los Angeles, California from the 1820s until 1849, when the gold fields of California became the destination and a shorter route was taken.

[2] This article incorporates public domain material from the website of the Utah Division of State Parks.