Hardrock and Osborn Hills Loop Trail

MODERATE 31 reviews

Hardrock and Osborn Hills Loop Trail is a 3.8 mile moderately trafficked loop trail located near Grass Valley, California that features beautiful wild flowers and is rated as moderate. The trail offers a number of activity options and is accessible year-round. Dogs are also able to use this trail but must be kept on leash.

3.8 miles 472 feet Loop

dogs on leash

kid friendly

birding

hiking

nature trips

trail running

walking

forest

views

wild flowers

wildlife

Walk around Empire Mine State Historic Park and explore several smaller abandoned mines and 100 years of mining history Welcome to Empire Mine State Historic Park, home to Empire Mine, which was once the most profitable gold mine in California during the gold rush. This hike will take you around the Empire Mine site and past several smaller mines which were all eventually absorbed as part of the large mining operation at Empire Mine. Along this hike you will see old foundations and rusted machinery covering 100 years of hardrock mining history.

1 month ago

3 months ago

hiking
4 months ago

hiking
5 months ago

walking
6 months ago

Easy. Nice short loops.

walking
7 months ago

hiking
7 months ago

walking
8 months ago

Very nice moderate walk

hiking
8 months ago

hiking
8 months ago

Beautiful loop. You can see the mine grounds, but can't enter without a fee - although the museum/visitors center is free. Some steep climbs.

8 months ago

Great ride with some good uphill climbs & some great technical riding from beginner to advanced riders

hiking
11 months ago

hiking
11 months ago

I took my over 50's ladies group up to hike a couple of the trails. We all made it okay but you I have to take into consideration you most definitely are hiking up and down a mountain. The paths are well used/maintained but there is a steep grade. The trails are used by lots of people so they are busy so not a whole lot of peace and quiet. It's nice that there are state maintained restrooms at the mine. Poison oak is on the sides of the trails so watch the kiddos and pets. We will do this trail again.

11 months ago

hiking
1 year ago

The Mansion and the grounds are very cool. Multiple loops for hiking as well.

1 year ago

horseback riding
1 year ago

1 year ago

hiking
1 year ago

hiking
1 year ago