Trip date: May 4, 2017
Yellow Butte is a hill on the north side of US Highway 97 about 12 miles northeast of Weed. Unlike other nearby peaks which are some kind of volcanic feature (dome, cinder cone or shield volcano), Yellow Butte is an uplifted complex of intrusive igneous and metamorphic rocks. This makes for some interesting quartzite outcrops on the top of the hill, and the unexpected diorite pluton along the first third of this route I hiked today.
Yellow Butte is actually more of a ridge, with three distinct peaks, the northernmost being the highest. The route I’ve seen described elsewhere is a 3 mile round trip starting inside a Forest Service gate alongside Highway 97 that traverses the west side of the hill. Because my available time was short, I chose a shorter route on the east side of the hill on Yellow Butte Road, a narrow, dusty two-track off of 97. This route proceeds up to saddle area between the middle and north peaks. Truth be told, both routes to the peak are old two tracks themselves – in fact, one could drive to the summit in a 4WD high clearance vehicle. But, as I got near the top, I encountered a guy camping in a beat-up, 30 year old, 2WD, low clearance Chevy van at the top – so don’t I guess I don’t know what I’m talking about.
I could not locate a survey triangulation mark indicated on some older topo maps. Neither could I find a summit log, so I left a new one behind.
Trip time is about 25 to 30 minutes each way.
For an excellent discussion of the geology of the lower Shasta Valley, see a masters thesis by Joseph Holliday, “The bedrock geology of the southeastern Shasta Valley, Siskiyou County, California”