Sonoma Mountain Road West Bike Climb - PJAMM Cycling

3.8
FIETS
5.2 mi
DISTANCE
1,951 ft
GAINED
6.8 %
AVG. GRADE

FULL CLIMB STATS
TOUR DETAILS & STATS
2021 Tour de France

INTRO

This climb ranks #8 on the Sonoma County climb list. The climb passes through classic Sonoma County pastureland (yes, not vineyard!) and is fairly remote, with minimal traffic. Through the middle portion of the ride (~ miles 3-4), there are very scenic views west towards Old Adobe Road, Petaluma, Mt. Tamalpais 25 miles south and Mt. St. Helena 25 miles to the north. This is a scenic ride where we are surrounded the entire trip by open fields and distant views of open space. The climb has some severe grades along two 50 yard segments.
6.8% average grade (8.1% with descent eliminated). 31% is at 0-5% average grade, 31% is at 5-10%, 13% is at 10-15%, and 14% is at 15-20%.  The steepest quarter-mile is 17.6% and steepest mile 12.6%.

See more details and tools regarding this climb's grade via the “Profile Tool” button.
Roadway:  Poor condition double lane rural roadway with no center stripe.

Traffic:  Mild.

Parking:  Just past the start of the climb on the left - Map; Street View
Information Not Available

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If you have travelled to Sonoma County to cycle or have any questions concerning cycling in the North Bay, you are welcome to contact me at john@pjammcycling.com with your questions about the area - I grew up and live in Sonoma and have good knowledge of cycling in this region.

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ROUTE MAP

MEMBER RATING

Difficulty: Strenuous
3
Road
4
Traffic
5
Scenery

CURRENT WEATHER

NEARBY CLIMBS (0) RADIAL PROXIMITY

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MEMBER REVIEWS & COMMENTS

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May 24, 2021
difficulty: Strenuous
scenery: 5
traffic: 4
road: 3
May 24, 2021
scenery: 5
traffic: 4
road: 3
This was far more difficult than I expected primarily due to the series of steep pitches, several of which exceed 20% and the 1/4 mile of each that is at least 15%. Once they are handled the remainder is not bad. Fair number of service trucks but tolerable. The scenery is worth it with views of Mt. Tam, San Francisco Bay, Mount Saint Helena, and the Santa Rosa Plain. Potholes are filled in but still bumpy in places.
ROUTE MAP
PROFILE TOOL

Climb Profile Not Found
CLIMB SUMMARY

Cycling Sonoma Mountain Road West

Ride 5.2 miles gaining 1,950’ at 6.8% average grade.

Sonoma Mountain Road West is the eighth most difficult bike climb in Sonoma County, with a Fiets Index of 3.8. The climb passes through classic Sonoma County pastureland (yes, not vineyard!) and is fairly remote, with minimal traffic.  

Through the middle portion of the ride (~ miles 3-4), there are very scenic views west towards Old Adobe Road, the historic farming town of Petaluma, Mt. Tamalpais 25 miles south, and Mt. St. Helena 25 miles north.  

Beautiful (and rustic) Sonoma County farmland.

This is a scenic ride where we are surrounded the entire trip by rolling hills, fields, and distant views of open space.  Toward the top of the mountain climb, riders can expect to see 180-degree views stretching from Santa Rosa all the way to the San Pablo Bay.  On an clear day, it’s possible to see as far south as the rust-colored arches of the Golden Gate Bridge.  The climb has some severe grades along two 50 yard segments.  It also has four segments of 100 to 400 yards that average over 16% (the steepest quarter mile on the climb averages 17.6%).

   

Traffic and Roadway Surface Report:  There is very little traffic along this very narrow roadway (wide single-lane, or narrow two-lane).  The roadway surface is extremely poor and there is quite a bit of loose gravel, as well as deep potholes, which justify using extreme caution on the descent.  Though the gorgeous views may tempt you, it is advisable to keep your eyes on the road during the descent so you can avoid any potentially dangerous rough patches of pavement.

Rough road and all, this is one fantastic bike ride.

That’s a wrap!