Hardrock and Osborn Hills Loop Trail

MODERATE 44 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.

DISTANCE
3.8 miles
ELEVATION GAIN
472 feet
ROUTE TYPE
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.

hiking
2 days ago

Right next to my house and one of my regular hike/walks. Lot's of little off shoots. My doggie Chloe always loved it. ♡

walking
10 days ago

Hardrock trail started out nice but the last mile is along the main road, no bueno.

hiking
15 days ago

hiking
1 month ago

It's was fun lot of people using the trail, not to hard of a walk

1 month ago

1 month ago

hiking
2 months ago

What a great day. Hiked with good friends after enjoying a wonderful lunch at one of the many shaded picnic tables. I will definitely be doing this one again.
Has just enough traffic so a lone hiker will feel safe. Park has easy to follow signs and more than one trail to choose from.
A definite 5 rating!!!!

2 months ago

Great spot. Love being around Empire Mine.

2 months ago

hiking
2 months ago

Great for families and dogs that love to be leashed. Grateful they have preserved this piece of history and that it has geocaches here. I would call this a neighborhood park more than a place to hike.

2 months ago

This was a wonderful hike for our family. We will have to go again and see if there is another way to end the 5 mile loop. The last stretch was next to the busy road, which it why I only gave it a 4 instead of 5, but the rest of the trail was wonderful.

2 months ago

4 months ago

6 months ago

hiking
7 months ago

hiking
8 months ago

walking
9 months ago

Easy. Nice short loops.

walking
10 months ago

hiking
10 months ago