This is of the Split Rock portion of the emigrant trails across Wyoming. On this side of the river are a few two tracks which were used by the settlers as they moved west. Many portions of the trails are drivable, but get land owner permission as most cross private lands. Split rock is the tallest peak in the background behind the river. The split is visible from the east, while the photo was taken from south of it.
In the bottom lands there is a SUV spec. There is also a car on the highway. The highway on both the far right and left edges of the pano is the same road. It is a near 360 view from on the big rock at the historic site off of WY hwy 287.
Zoom in image of the area with the Sweetwater River, trails and SUV spec.