During the Mission Era the Mission San Gabriel established a Spanish settlement Politana in 1810, just northeast of what is now Colton. By 1840, Colton was part of two private ranchos, Jurupa and San Bernardino Rancho. From southwest area of modern-day Colton was known as "Agua Mansa" (Gentle Waters). It had been settled by New Mexico pioneers in 1842. What is currently known as Cooley Ranch was known as Indian Knolls for nearly 100 years. This is because the Indians living in what is now the San Bernardino Valley found refuge on the knolls of the property during the flood of 1862.