The highway continues northeast along a ridge overlooking Rattlesnake Creek and passes through a forested area around Fields Spring State Park, a recreation area near Rattlesnake Summit at an elevation of . SR 129 makes a gradual turn to the north and enters the rural plateau on which the community of Anatone sits. The highway then travels northeast along Mill Creek and Ayers Gulch, making a brief turn due east near Dwight Halsey Road before continuing north towards Asotin. On the southern outskirts of the city, SR 129 begins a series of switchback turns while descending from the plateau towards Hells Canyon on the Snake River. The roadway turns south and crosses a gully while turning northwesterly; it then makes a sharp turn to the east after passing the city cemetery and continues through another zig-zag turn before reaching the Asotin city limits.