From Janesville about 24 miles, take Janesville Grade Road south to right on Forest Road 29N43 to left on Diamond Mountain Mountainway, to Forest Roads 28N02 and 28N31 which are the claim roads, using then GPS coordinates listed below to the claim.
From Susanville about 23 miles, take Richmond Road south to right on Gold Run Road, to left on Diamond Mountain Road, to left on Diamond Mountain Mountain Way, to Forest Road 28N02 which is the claim road along with continuing south which becomes 28N31, then using GPS coordinates below to the claim.
Two principal approaches to the claims are, for the west end, via the Gold Run Road (County Rd. 204) from Susanville or, for the east end, from Highway 395 via the Janesville Grade (Country Rd. 208). Both roads connect with Forest Road 28N02 which is the claim road, which traverses the south (Plumas) slopes of the mountain. Two miles west of Thompson Peak, Forest Road 29N43 forks north from Road 28N02 and provides access to the north (Lassen) slopes of the mountain; the road then drops through timberlands north of the crest to join the Gold Run Road.
Pierce Creek Gold #1
NW 40.27523, -120.65168
NE 40.27523, -120.64704
SW 40.27166, -120.65168
SE 40.27166, -120.64704