- Acreage: 20 acres
- River footage: 1300’ Grimes Creek
- Placer/lode: placer
- Unpatented/patented: unpatented
- Location: Boise County, Township 8N, Range 6E, Sec. 16, SW ¼
- Mining claim serial #: IMC220465
Map to Claim
NW 44.0262208’N, -115.7642211’W
NE 44.0262208’N, -115.7590942’W
SE 44.0241583’N, -115.7590942’W
SW 44.0241583’N, -115.7642211’W
NW 44°01’34.3950”N, -115°45’51.1960”W
NE 44°01’34.3950”N, -115°45’32.7390”W
SE 44°01’26.9700”N, -115°45’32.7390”W
SW 44°01’26.9700”N, -115°45’51.1960”W
Driving Directions from Boise:
Driving option 1 Grimes Pass, closest distance to claim: From the I-84 Exit 57 (ID-21) turn left off the exit, and head north onto HWY 21 for 34 miles until you reach Idaho City. At Idaho City, make a left onto Main Street (across from the service station), and follow Main Street for about a half mile making a left onto Centerville Road (NF 307). Follow this approximately 7 & ½ miles and turn a right into Centerville on Grimes Pass Road or NF 382. Stay on this for 11.5 miles, until you reach Grimes Pass, where you will cross Grimes Creek and then stay right at the Y, which is NF 397. Stay on NF 397 for 3.2 miles (which follows up along Grimes Creek), the main road does a switchback and heads up the mountain, at this switchback, make a right onto NF 397B (which continues along Grimes Creek), for about 1.2 miles. At the end, there is a camping area next to Grimes Creek…the main road does a switchback and heads up the mountain. There is a 4WD / ATV road (called White Cap road on maps), which extends up along side Grimes Creek for another 3/4s of a mile before ending. From this location the “Grimes Nugget” mining claim is 1000’ to the southeast (as a crow flies) or about a ½ mile upstream along the trail that follows along Grimes Creek. Trail is designated as being open to motorcycles (or on foot, horseback).
Driving option 2 by Coulter Summit): By following the previous instructions, at Centerville Road (NF 307), turn right onto Grimes Pass Road (NF 382), Travel another 7.2 miles on NF 382, making a right in Pioneerville (look for the sign that says Pilots Peak, just a few old structures around Pioneerville) onto NF 380. You will be on NF 380 for about 9.5 miles, the road follows along Clear Cr for a ways, and then goes up over Coulter Summit, and when you drop back down, the road crosses (a bridge) over Grimes Creek. There are a few places to park and camp right there next to the bridge. The “Grimes Nugget” claim is situated 2 miles downstream on Grimes Creek, and there is a pack trail that follows Grimes Creek. Trail is designated as being open to motorcycles (or on foot, horseback).
I found that it tends to be faster getting up there, by taking HWY 21 through Idaho City, although one could take HWY 55, up to Horseshoe Bend, and then over to Placerville & then Centerville area as well. Also, while Google maps “may show” going up past Idaho City to Mores Creek Summit, then left onto NF 380 as being the shortest and fastest route… that section of road (from HWY 21 to Pilots Peak), is a narrow, steep and rough one.
Geological Report for “Mammoth Mine” and other vein activity in that area.
Geological Report for Grimes Pass & vein activity in the area