Its located in the lower san gabriel canyon, right across the Morris Dam
First read about it in lagoldmines website.

We went to take a casual stroll, not expecting to reach it. But we were able to climb the waterfalls and get through the poison oak and brush safely enough.
This is the start, Silver Fish Rd.

So poison oakey

One of three or four waterfall climbs


The Mine shaft, eerie light peering out

Its a really cool tunnel! Its about 650 feet total. The main level in loops around!

Theres also a lower tunnel too. You have to crawl to access the lower passages

A frozen flooded section. The water was icy cold of filled with thin calcium sheets. So neat!

Cool mineral stuff!

I'd definitely come back!
For details, logistics, history, more pics, etc: http://angelesadventures.com/kelsey-silver-mine/