Trinity Grade  Bike Climb - PJAMM Cycling

Trinity Grade


A Sonoma County favorite and most direct route over the Mayacamas Mountains to Napa.

Explore this Climb

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Climb Summary

Cycling Sonoma County - Trinity Road - pjamm cyclist at finish - fire station

Volunteer Firehouse is the finish of the Trinity West climb.

Trinity West ranks #12 on the Tri-County Top 25 list, with Fiets Index of 3.67. This is a favorite climb for local cyclists and is one of the few connectors between Napa and Sonoma Counties.  The views are not spectacular, but the climb is challenging and generally a steady 6-10% from start to finish.   The finish of this climb is at the intersection of Cavedale and Trinity Roads at the Mayacamas Volunteer Fire Station, where there is normally water and a cycling pump -- it is "cyclist friendly" (Thank you MVFD!).

Cycling Sonoma County - Trinity Road - aerial drone view of Sonoma Valley

Start is just east of Highway 12.


Cycling Sonoma County - Trinity Road - road signs at start of climb

Fair warning . . .


. . . but, seems like a bit of overkill . . .

Just past the start -- May 17, 2020.

bike climb Cycling Sonoma County - Trinity Road - cyclist riding bike on road past statues

climbing Trinity Road by bike - cyclist on road riding past loose gravel sign

Beware on the descent.

One of the most dangerous in the county.

Cycling Sonoma County - Trinity Road - aerial drone view of Sonoma Valley and Mt. Tamalpais.

Aerial drone photo south across Sonoma Valley to Mt. Tam (photo upper middle).


Cycling Trinity Road - finish - cyclist at fire station

Finish at the firehouse . . .

. . . the intersection of Cavedale and Trinity Roads.


Trinity Grade has been featured twice in the Tour of California:

  • 2007, Stage 2
  • Santa Rosa to Sacramento (western approach)
  • 95.2 miles, 5,672’
  • Stage winner:  Levi Leipheimer (USA)

  • 2010, Stage 2
  • Davis to Santa Rosa (eastern approach)
  • 111.9 miles, 8,486’
  • Stage winner:  Brett Lancaster (AUS)


That’s a wrap!