Follow the trail up the hill stopping along the way at the information points. You will need to get a clue from each location to find the cache. Each point is printed below with the title and there is a checksum at the end so you don't end up on a wild goose chase.
Point 1 - Goldmines at B G
What year did Dach, Abbott & Alfred Quincy apply for claims 119, 120, 121?
Take the last digit of the year. This is digit A.
Point 2 - Staking a Claim
What is the number on the Miner's Right?
Add all the digits of the number together to get a two digit number. Add these two digits together and subtract 1. This is digit B.
Point 3 - Golden Boulder North
What year was work on claims 119, 120 & 121 stopped?
Take the last two digits of the year and add them together. This is digit C.
Point 4 - Prospecting
What is the other name for trenches?
Take the number of letters (including the 's'). Add 1. This is digit D.
Point 5 - Working the Claim
How many kgs of ore could the battery treat per day?
Take the last digit of the number of kgs. This is digit E.
Point 6 - Miners' Lifestyle
What is the year of the newspaper on the left?
Take the decade of the year (third digit). This is digit F.
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Now add all the digits together and you should get a total of 36.
The cache is located at S 27 25.ABC E 152 53.DEF
You might have trouble getting a signal, if so try a little further up the hill and persevere.