Original: Leaving Dos Palmas, the men continued eastward between the Orocopia and Chocolate mountain ranges, briefly skirting the southern end of the Chuckwalla range and ending at the Palo Verde Valley.
Simplified: Leaving Dos Palmas, the men continued eastward between the Orocopia and Chocolate mountain ranges, briefly passing by the southern end of the Chuckwalla range and ending at the Palo Verde Valley.