Costa Peak–Maricich Lagoon, 6 lakes is an 8.5-mile out-and-back in Briones Regional Park near Muir, CA. The route passes Maricich Lagoon, Sindicich Lagoon 2 and Sindicich Lagoon 1 before reaching Costa Peak at the turnaround, 4.3 miles in. It climbs 1,482 ft, with sections as steep as 17% grade, and is mostly dirt. It scores 78/100 on the Ambleway Wildness scale: genuinely wild.
Elevation
0 mi374 – 1,345 ft · steepest grade: 17%8.8 mi
Getting there
Trailhead: Diablo View Trail 37.95638, -122.12363
Nearest town Muir, CA
Directions
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Costa Peak–Maricich Lagoon, 6 lakes
8.5 mi · ▲ 1,482 ft · 3 hr 34 min
Elevation 375–1,346 ft
Out & Back · Briones Regional Park
Trailhead: Diablo View Trail · 37.95638, -122.12363
Weather Aug 4: sunrise 6:15 AM · sunset 8:16 PM
Toilets at the trailhead · Drinking water at the trailhead · Parking lot at the trailhead
- Start at the trailhead, heading SW.
- 1 miBear right onto Spengler Trail, heading SW.
- 0.7 miPass Maricich Lagoon.
- 50 ftTurn left onto Briones Road, heading SW.
- 0.3 miContinue straight onto Old Briones Road Trail, heading SW.
- 50 ftTurn right onto Briones Crest Trail, heading W.
- 150 ftPass Sindicich Lagoon 2.
- 50 ftTurn left, heading NW.
- 0.2 miPass Sindicich Lagoon 1.
- 0.3 miContinue straight onto Mott Peak Trail, heading SW.
- 50 ftTurn right onto Briones Crest Trail, heading SW.
- 1.7 miTurn right onto Service Road, heading SW.
- 0.2 miReach Costa Peak, then turn around and head back the way you came.
- 0.2 miTurn left onto Briones Crest Trail, heading SE.
- 1.7 miTurn left onto Mott Peak Trail, heading S.
- 50 ftContinue straight onto Briones Crest Trail, heading S.
- 0.5 miTurn left, heading E.
- 200 ftTurn left onto Old Briones Road Trail, heading SE.
- 50 ftContinue straight onto Briones Road, heading SE.
- 0.3 miTurn right onto Spengler Trail, heading N.
- 0.7 miBear left, heading SE.
- 0.9 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
96% dirt4% unspecified
Weather
Sunrise 6:15 AMSunset 8:16 PM
Sunset
The best sunset spot on this hike is 2.6 mi in (~93 min). Leave by 6:23 PM for the 8:16 PM sunset. Back at your car by 9:34 PM, after dark — bring a headlamp.
Good to know
- Toilets at the trailhead
- Drinking water at the trailhead
- Parking lot at the trailhead
Other ways to reach this destination
More from Diablo View Trail Trailhead
- Orchard Trail & Pine Tree Trail to Orchard Trail 2.3 mi · ▲ 284 ft
- Spengler Trail 3.8 mi · ▲ 892 ft
- Maricich Lagoon via Spengler Trail 4.4 mi · ▲ 803 ft
- Briones Peak–Old Briones Viewpoint Loop, 6 sights 4.6 mi · ▲ 1,125 ft
- Spengler Trail 5.6 mi · ▲ 1,363 ft
- Old Briones Viewpoint–Maricich Lagoon, 4 sights 6.1 mi · ▲ 1,153 ft
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