Nortonville - Coal Canyon - Black Diamond
6.0 miles     1500 ft
24 Apr 2011

Gorgeous route through forests and open spaces of Black Diamond Mines going through mining related attractions in the park.

Location: Black Diamond Mines Regional Preserve

Elevation Profile
Trip Planning

Trail Maps

» Official Trail Map: Good map showing various trails. Also check out Text section of the map.


Trailhead: Second parking lot on Somersville Road, located at the end of the road.

Route in brief: Nortonville Trail (0.06 + 0.07 + 0.11 + 0.18 + 0.42 + 0.39 miles) → Coal Canyon Trail (0.89 miles) → Black Diamond Way (0.20 + 0.39 miles) → Black Diamond Trail (0.32 + 1.12 miles) → Manhattan Canyon Trail (0.28 miles) → Chaparral Loop Trail (0.40 + 0.11 + 0.09 miles) → Pittsburg Mine Trail (0.27 miles) → Stewartville Trail (0.10 + 0.11 miles) → Nortonville Trail (0.06 miles).

Notes: Nortonville Trail is a wide fire road that takes you up and down a hill as you travel west from Somersville Rd trail head. Coal Canyon Trail is a nice trail that climbs quickly out of a canyon, meandering through a forest. Black Diamond Way is a paved road for about half a mile with lush green trees and meadows on both sides in spring. Black Diamond Trail is a wide fire road. Manhattan Canyon Trail and Chaparral Loop Trail take you through a forest. Some sections of these trails are steep.


Location: 5175 Somersville Road, Antioch, CA 94565 . Parking area is visible in Google Maps if you zoom in sufficiently.

Directions: From I-680 North, take CA-242 North and drive for 3.2 miles. Continue along CA-4 East and drive for 11.6 miles. Take exit 26B for Auto Center Drive and turn right onto Auto Center Drive / Somersville Rd. Within 0.1 miles, make a U-Turn and follow Somersville Rd for 3.7 miles. There are two parking lots on Somersville Rd for Black Diamond. The trailhead is at the second parking lot, deeper into the park.

Google Maps:

Parking Fees: $5 per vehicle when entry kiosk was manned, free otherwise. (last visited: April 2011)

Capacity: Over 30 cars

Latitude: 37.958766     Longitude: -121.862991

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