Blue Ridge/Rocky Ridge

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blueridge1.jpgHiking trail with Blue Ridge in the background to the left.

  1. Overview
  2. Geology
  3. Access
    1. Accessing the North-East Side
    2. Accessing the North-West Side
  4. Activities
    1. Bicycling
    2. Camping
    3. Climbing
    4. Four Wheel Driving
    5. Hiking and Backpacking
    6. Trip Reports

Overview

Blue Ridge and Rocky Ridge form a 30 mile long divide in the Northern Coast Range west of Davis in Napa County. Their southern terminus is located at Monticello Dam, just north of Cold Canyon. Combined, they extend in a north-north-west direction for 30 miles until the northern terminus of Blue Ridge at the mouth of Cache Creek, north-west of the town of Rumsey. Lake Berryessa and the Putah Creek drainage are located to their west. Capay Valley and the Cache Creek drainage are located to their east.

Geology

Mostly unknown to me. I imagine Blue Ridge and Rocky Ridge are part of the same geological formation. The two ridges appear to actually be one ridge broken in two pieces by a saddle cut by Green Canyon/Creek. I'd like to hear about it from a real geologist.

Access

Public access to this area is extremely limited.
There are NO trailheads and NO public hiking lands anywhere on Rocky Ridge.
Blue Ridge can be accessed only at the north end via [WWW]Blue Ridge Trail, [WWW]Valley Vista Trail, Long Canyon Trail & nearby areas in [napa]Knoxville Wildlife Area.

Activities

Blue Ridge and Rocky Ridge are some of the closest major geological features to Davis which provide the opportunity for outdoor activities. If it is hot in Davis, it will be hot on Blue and Rocky Ridges. For this reason, recreating in this areas is best in the late fall, winter, or early spring.

blueridge2.jpgHiking up Long Canyon toward Blue Ridge in February.

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2011-05-30 08:09:54   I'll look into the geology of the ridges. I suspect most of it is part of the Great Valley Sequence (Cretaceous). A cursory look at the [WWW]CGS Geologic Map of California show lower and upper great valley sequence in the area. I will integrate into the main article once I find larger scale maps with better map units. —RyanMikulovsky

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