2012 Map of Onion Springs

About this map

Onion Springs and a network of ephemeral watercourses define this high-plains landscape in the early 21st century. The drainage patterns of Horse Cr and Onion Cr in the north transition to a more complex system of intermittent streams in the south, including N Cottonwood Cr, S Cottonwood Cr, and Killpecker Cr. Human presence is marked primarily by ranch roads and land management routes, such as Ryegrass Rd and Cottonwood Ryegrass Rd, which traverse the open range between distinctive topographical features like Brodie Draw. The southern portion of the sheet is notable for the North Antelope Draw and South Antelope Draw, illustrating the subtle yet significant relief that dictates the flow of Muddy Cr and other local drainages across Sublette County.