username
X
password
register help

San Geronimo Ridge, CA

details
drive
no permit
forecast
route
stats
photos
triplog
topics
location
37 1 0
Guide 1 Triplog  0 Topics
Rated  Favorite Wish List CA > Bay Area
Rated
0
0 of 5 by 0
 
0
Statistics
clicktap icons for details
Difficulty 3 of 5
Route Finding 2 of 5
Distance Round Trip 8.6 miles
Trailhead Elevation 484 feet
Elevation Gain 1,000 feet
Accumulated Gain 2,500 feet
Avg Time Round Trip 4 hours
Kokopelli Seeds 21.1
Interest Seasonal Waterfall & Seasonal Creek
Backpack No
Photos Viewed All Mine Following
Collective Slideshow
Inaugural Calculation next Tap
21  2014-04-05 JimmyLyding
16  2014-03-08 JimmyLyding
Historical Weather
Trailhead Forecast
Radar
Expand Map
Preferred   May, Oct, Apr, Jun → 7 AM
Seasons   ALL
Sun  6:48am - 5:01pm
openimportsetbegin
Route Scout App
19284followactivity
Official Route
 
0 Linked
 
Water
Nearby Area Water
Pine Mountain Marin
Pine Mountain Marin
2.0 mi away
8.6 mi
1,860 ft
Toyon Fire Road to Cascade Peak
2.1 mi away
4.5 mi
1,400 ft
Thorner Ridge and French Ranch
2.1 mi away
4.6 mi
1,000 ft
Cascade Fire Road - Cascade Falls Trail
2.3 mi away
1.7 mi
400 ft
Roys Redwoods
2.5 mi away
3.0 mi
500 ft
Cascade Canyon to White Hill
2.5 mi away
7.8 mi
1,900 ft
Loma Alta and Big Rock Ridge Trail
2.7 mi away
11.3 mi
1,500 ft
San Rafael and Fairfax Waterfalls
3.1 mi away
12.0 mi
Pine Mountain Loop
Pine Mountain Loop
3.2 mi away
13.3 mi
2,770 ft
Azalea Hill and Pine Mountain Trails
3.2 mi away
4.8 mi
1,762 ft
[ View More! ]
Flora Nearby
Marin High Country
by JimmyLyding

San Geronimo Ridge lies between the exurban communities of Forest Knolls and San Geronimo to the north and deep canyon of Kent Lake to the south in Marin County. The description is that of a shuttle hike from the White Hill Preserve trailhead just west of Fairfax, CA to the Leo T. Cronin Fish Viewing Area. There's a big catch, however: parking at the Cronin Fish Viewing Area is limited to 60 minutes during salmon and steelhead spawning season (January-March), and typically closed during the rest of the year so most hikes are out-and-back from either White Hill or one of the access points to the north by San Geronimo.

The White Hill Preserve parking lot is located on the west side of Sir Francis Drake Blvd. near the divide between the two watersheds that respectively drain into San Francisco Bay to the east and Tomales Bay to the west. The parking lot is actually about 100 yards south of the true trailhead, and there is an alternate route to the top of the first ridge right off the parking lot. The true trailhead is part of the Bay Area Ridge Trail, and it is reached by heading north/uphill from the parking lot between road barriers. The next portion goes a 0.9 mile through open areas exposed to the roadway noise below and deep forests of Douglas fir and California bay before somewhat reaching the top of the ridge.


The goal is to stay on the Bay Area Ridge Trail, and that's fairly easy to do because it's well-signed. The signage is very weathered here, but the correct route is indicated by arrows and a circular emblem showing a rough outline of the Bay Area in blue and white. I neglected to take a picture of one. The next stretch goes about 1.5 miles near the top of the ridge through more open areas. Most of the north side is private property, and a lot of it is grazed. The stretches of forest here are typical of the Bay Area's common mix of Douglas fir, California bay and coast live oak forests being islands in seas of grass and coastal chaparral. Views of the San Geronimo Valley to the north and the deep canyons of Kent Lake enchant on both sides

Soon thereafter the trail goes through an area of serpentine. The plants are stunted and the soil is greener and grayer here, and the transition from the typical Marin vegetation to the uniqueness of the serpentine environment is startling. There is literally a precise point where the trail goes from being red/brown/blonde to green/gray. You are now on the San Geronimo Fire Road 3.5 miles from the trailhead, and the trail goes up and down. The Sargent cypress is the most notable plant here. It typically forms dense stands in serpentine soil, and looks like a juniper shaped like a mushroom.

Continue west on the San Geronimo Fire Road for another 2 miles as it leaves the serpentine and heads into second growth forest. Isolated groups of redwoods have made their appearance before now, but they are now common on the north side of the route which is still on top of the ridge. Dougies are prevalent, but there is a noticeable difference between the forest on the north side and chaparral to the south down to Kent Lake 800' below.

Continue following the Bay Area Ridge Trail west as it goes up and down, not as dramatically as a few miles back, before plunging down the Lagunitas Creek drainage below Kent Lake's spillway. The forest has grown quite tall here and the Leo T. Cronin Fish Viewing Area has a small parking lot to serve the people who want to see spawning salmon and steelhead on the relatively large Lagunitas Creek. This is either a great place to be picked up or merely turn around, and walk the other way.

JimmyLyding
    WARNING! Hiking and outdoor related sports can be dangerous. Be responsible and prepare for the trip. Study the area you are entering and plan accordingly. Dress for the current and unexpected weather changes. Take plenty of water. Never go alone. Make an itinerary with your plan(s), route(s), destination(s) and expected return time. Give your itinerary to trusted family and/or friends.

    Permit $$
    None


    Directions
    Map Drive
    or
    Road
    Paved - Car Okay

    To hike
    Drive 8 miles west on Sir Francis Drake Blvd. from US Hwy 101 to a small parking area right off the road to the left. There is room for about 10 cars on the west/left side, and also about 5 more on the right/east. If you drive over a small bridge and into the next drainage to the west then you went too far.
    page created by JimmyLyding on Apr 06 2014 8:48 pm
    help comment issue

    end of page marker