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Contra Loma Regional Park - panoramio (3).jpg
Masrur Odinaev · CC BY-SA 3.0
Black Diamond Mines Regional Preserve

Contra Loma Reservoir–Acorn Trail, 6 sights

7.5 mi · ▲ 1,268 ft · 3 hr 8 min

Contra Loma Reservoir–Acorn Trail, 6 sights is a 7.5-mile out-and-back in Black Diamond Mines Regional Preserve near Antioch, CA. The route reaches Contra Loma Reservoir. It climbs 1,268 ft, with sections as steep as 16% grade. It scores 41/100 on the Ambleway Wildness scale: green fringe.

Elevation

0 mi213 – 1,135 ft · steepest grade: 16%7.7 mi

Getting there

Trailhead: Unnamed 37.97744, -121.82668
Nearest town Antioch, CA
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Directions

AMBLEWAYwww.ambleway.com

Contra Loma Reservoir–Acorn Trail, 6 sights

7.5 mi · ▲ 1,268 ft · 3 hr 8 min

Elevation 215–1,137 ft

Out & Back · Black Diamond Mines Regional Preserve

Trailhead: 37.97744, -121.82668

Weather Sep 20: Overcast, high 77°F / low 56° · precip 1% · wind 8 mph · sunrise 6:54 AM · sunset 7:09 PM

Transit-accessible: James Donlon Boulevard & Contra Loma Boulevard stop 526 m from the trailhead

  1. Start at the trailhead, heading SW.
  2. 50 ftPass Contra Loma Reservoir.
  3. 0.7 miTurn right, heading SW.
  4. 200 ftBear left, heading S.
  5. 0.5 miTurn right, heading SE.
  6. 0.2 miContinue straight onto Old Homestead Loop Trail, heading W.
  7. 1.2 miContinue straight onto North Portal Trail, heading W.
  8. 50 ftTurn right onto Old Homestead Loop Trail, heading SW.
  9. 0.3 miSharp left onto Acorn Trail, heading N.
  10. 0.4 miTurn left onto Ridge Trail, heading S.
  11. 0.9 miSharp left onto Contra Loma Trail, heading SE.
  12. 1.2 miBear left onto Stewartville Trail, heading E.
  13. 0.3 miTurn left onto Homestead Trail, heading N.
  14. 0.3 miSharp right, heading W.
  15. 0.2 miTurn left, heading E.
  16. 0.5 miBear right, heading NW.
  17. 150 ftTurn left, heading N.
  18. 0.7 miArrive back at the trailhead.

Each distance is the walk from the previous step. Tap a step for a map of its junction.

Trail map, photos and weather for this hike: www.ambleway.com/hikes/contra-loma-reservoir-contra-loma-reservoir-out-back-7-sights

Trail surface

55% dirt25% gravel20% unspecified

Weather

OvercastTemperature 77°F56°
Precip1%Wind8 mphUV5Humidity54%
Hourly temperature
80°55°
Sunrise 6:54 AM12 AM3 AM9 AM12 PM3 PMSunset 7:09 PM
Mon 77°56°
Tue 86°53°
Wed 90°62°
Thu 87°65°
Fri 86°61°
Sat 86°62°

Good to know

  • Transit-accessible: James Donlon Boulevard & Contra Loma Boulevard stop 526 m from the trailhead

Other ways to reach this destination

Hikes near Antioch, California