Loma Alta and Big Rock Ridge Trail is a 6.7 mile moderately trafficked out and back trail located near San Rafael, California that features beautiful wild flowers and is rated as moderate. The trail is primarily used for hiking, trail running, horses, and mountain biking and is accessible year-round. Dogs are also able to use this trail but must be kept on leash.

DISTANCE
6.7 miles
ELEVATION GAIN
1,322 feet
ROUTE TYPE
Out & Back

dogs on leash

hiking

horseback riding

mountain biking

trail running

views

wild flowers

rocky

Take the Big Rock Ridge trail to explore sections of the Lucas Valley Open Space Preserve. This hike feature nice views and meanders through a mixed range of elevation and biomes

hiking
1 month ago

I did this hike last weekend. There was almost no shade. I got a nice tan after this hike even with sunscreen on. It’s very challenging on a hot day! Lots of uphill climbing and the Downhill on the way back can be hard on the knees. I only saw one person on the trail on a weekday. The hills are no joke. Lots of climbing! Bring lots of water!

hiking
4 months ago

Hiked from Big Rock trailhead to just past the transmission towers, then back. Great views, good workout, beautiful views. Total hike: 7.2 miles, 1,325 ft of elevation, 2 hr 41 min.

8 months ago

Great- good parking. Steep areas and great views. Saw a coyote. Met runners along the way and had a great workout.

hiking
9 months ago

Good out and back hike. Starting at Big Rock the trail is all uphill for 3.5 miles. The elevation change is moderate and provides a good workout but not a difficult one.. Beautiful vistas of Lucas Valley the entire way. Not much shade cover.

Saturday, May 13, 2017

Great view of the bay, city and mt Tam.

hiking
Friday, May 12, 2017

Nice gradual incline the entire way out. You'll start to feel it but the grade is shallow enough that you're able to keep your breath. Good workout that's not too brutal.

hiking
Sunday, February 19, 2017

Even on a windy, overcast mid-February day this was a great hike. Amazing views (East Bay, San Francisco, highway 37 all the way through Vallejo).

We did a slightly different route than the one published, turning it into a point-to-point hike instead of out-and-back. Parked one vehicle at the end of the Luiz Fire Road (on Creekside Drive), and started the hike at the Big Rock trailhead. Overall hike was still ~7 miles, taking us along the ridge for a solid ~2.5 miles. Hike time was 3 hours.

According the posted signs, portions of this alternate route are closed during deer hunting season (some of the route is an easement on private ranch land). So check before heading out.

hiking
Saturday, September 24, 2016

I took the Big Rock Ridge trail all the way to the radio towers. This hike meandered through a mixed range of elevations and had fabulous views of overlooking the Skywalker Ranch, and on the top I could see as far as San Francisco.

mountain biking
Sunday, September 04, 2016

Once at the peak, you'll experience great views and have the option to go down numerous offshoot trails.

https://youtu.be/zPq7GUQO7uw
https://youtu.be/Urm8R-MALw0

hiking
Saturday, January 30, 2016

A little more challenging than I thought it was going to be. A good charge up hill.

Monday, January 25, 2016

While it says easy, it is a pretty good clip uphill. It is very close to my place so I will definitely go again, but I may not go the full way to the radio tower. I think I would instead turn around at the spot about halfway through where you are overlooking Skywalker Ranch.

Sunday, February 01, 2015

Sat Jan 31st - got WAY over ambitious and spent 6 hours on this trail - dangerous for my stage of health-- up Big Rock - to the tower then up to Luiz trail - total of 4.5 hours climbing up - then 1.5 dangerously steep downhill gravel road - collapsed at end of trail -- won't try this again for at least 6 months!! Yikes!..

Sunday, February 01, 2015

Wed Jan 14 - first time I eer attempted Big Rock Trail - 75 minutes -- awesome trail - loved it- Jan 17th - came back for 120 minutes, with Katherine and Emilio

1 month ago

hiking
2 months ago

hiking
3 months ago

trail running
4 months ago

hiking
7 months ago

recorded Big Rock

hiking
7 months ago

hiking
7 months ago

hiking
10 months ago

hiking
10 months ago

hiking
10 months ago

mountain biking
11 months ago

hiking
Friday, October 06, 2017

hiking
Friday, September 15, 2017

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