From the 2014 MG

From Boise, take ID-21 north for 20.8 miles, turn loft onto Grimes Creek rd.
Go 1.7 miles and arrive at the southeast corner of the claim
Camping available, water year round, rich fines reported

You can also go to the online guide , click on the coordinates in the heading, that takes you to a google map app
Navigate from that

Good luck in your search
Bill