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

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

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 Aug 4: Clear, high 96°F / low 65° · precip 0% · wind 8 mph · sunrise 6:14 AM · sunset 8:15 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 surface

55% dirt25% gravel20% unspecified

Weather

ClearTemperature 96°F65°
Precip0%Wind8 mphUV8Humidity24%
Hourly temperature
100°65°
Sunrise 6:14 AM12 AM3 AM9 AM12 PM3 PM6 PMSunset 8:15 PM
Wed 91°59°
Thu 99°65°
Fri 104°68°
Sat 103°67°
Sun 100°67°
Mon 97°63°

Sunset

The best sunset spot on this hike is 0.0 mi in (~1 min). Leave by 7:53 PM for the 8:15 PM sunset. Back at your car by 8:31 PM — 12 min before dark. Trailhead visible from the viewpoint

More sunset hikes nearby

Good to know

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

Other ways to reach this destination