CLEAR LAKE IS  AVA- 7     @Lakeport

  • WHITE= Sauvignon Blanc 21%, Chardonnay, Gewurztraminer, Muscat Orange, Muscat Canelli, Riesling, Semillon, Viognier
  • RED= Cabernet Sauvignon 42%, Zinfandel 19%, Barbera, Counoise, Garnacha, Malbec, Merlot, Montepulciano, Mourvedre, Nebbiolo, Petit Sirah, Petite Verdot, Primitivo, Souzao, Syrah, Tempranillo, Tinta Cao, Touriga Nacional, Trousseau

GEOGRAPHY California,  North Coast(North-East),  LATITUDE: 39° N

  • Sub AVA.’s Benmore Valley AVA., Big Valley AVA., Guenoc Valley AVA., High Valley AVA., Kelsey Bench AVA., Red Hills AVA.   | UN-OFFICIAL– Long Valley AVA.,  Upper Lake Valley AVA.
  • Sub-Zones: Clover Valley– North of Clear Lake(5mi.)
    • Bachelor Valley– North-East of Clear Lake(15mi.)
    • Scotts Valley– North-East of Clear Lake(10mi.)
  • BORDERS: Mendocino(West), Napa(South), @Hw.#20 & Hw.#29

TOPOGRAPHY Flat/ Rolling/ Hilly/ Mountainous/ Valleys(Benmore, Big, Guenoc, High, Long)

  • BETWEEN: Mayacamas Mountains, Vacca Mountians, Mendocino Range
  • SLOPES/ Alto-Mayacamas Mountains(North), +Alt.1,382 ft. at Lake Level
    • Cobb Mountain 4,724 Feet High, Mount Konicti 4,285 Feet High
  • On~Clear~Lake~(Surrounding), Clear Lake is North Americas Oldest Lake
    • (2.5 Million Years Old and the Largest Lake Within the Borders of California
  • **Refer to “CLIMATE/ Altitudes” For Additional Information.
  • TOPOGRAPHIC EVENTS– Lake County Has Had Volcanic Activity 10,000 Years Ago.
    • Fault Movement/ Activity– Clear Lake is Directly Over the Main Basin Fault & Konacti Bay Fault Line.
    • Clear Lake Volcanic Field– Cluster of Doormat Volcanos (Late Piocene to the Early Holocene Epoch Areas, 5.3 Million Years Ago to 11,700 Years Ago.) Clear Lake Volcanic Field is Made Up of Lava Domes(Formed by Magma Being Erupted Onto the Surface, Then Piling Up Around the Vent), Cinder Cones(Piles of Lava Blown Into Air and Break Into Small Fragments That Fall Around Opening of Volcano Maars (Shallow, Flat-Floored Crater Resulting From Violent Expansion of Magmatic Gas), Geysers Magma Chambers/ Geothermal Field That Powers a Geothermal Power Plant. The Eruption Products Range from Basalts to Rhyolite Material.
    • Cobb Mountain Volcano– +Alt. 4,724 ft.
    • Mount Konacti Volcano– Stratovolcano +Alt. 4,285 ft.
    • Round Mountain Volcano– +Alt.3,599 ft.
    • Cache Formation– Sequence of Fluvial and Partly Lacustrine Sandstone, Conglomerate, and Siltstone That’s Exposed In the Clear Lake Basin and Along the North Fork of Cache Creek.
    • Lower Lake Formation– Sequence of Lascustrine Siltstone, Sandstone, and Pebbly Sandstone, Limestone, Calcareous Siltstone, Diatomite and Interbedded Tuff and Lapilli Tuff.
    • Franciscan Formation

SOILS  Metamorphic, Volcanic, Sedimentary, Wind-Loess

  • Aiken/ Weathered Basalt, Quarts, Glenview-Bottlerock, Konacti-Benridge, Collayomi
  • Obsidian(Black Volcanic Glass/ Magma That Oozed Out of Volcano and Cooled quickly In the Open /Air.)
  • Lake County Diamond(Quartz Cyrstals Embedded in Volcanic Rock That Have Broken Free.)
  • SOIL SERIES–    Clear Lake Series–     –Cole Series
  • Hillside Volcanic– Gravelly/ Rocky and Well Drained. These Soils Are Red In Color and Include Aiken/ Basalt, Arrowhead/ Obsidian and Soda Bay/ Scoria Soils
  • Hillside Sandstone Shale– Found On Mountains That Were Once Ancient Sea Floor, These Soils Are Well Drained and Shallow. These Soils Are Yellowish- Brown In Color and Include Maymen, Mayacamas and Hopland Soils
  • Alluvial Terraced– Formed by Combination of Geologic Uplift and River Down-Cutting. These Soils Are Found Throughout Lake County. These Soils are Reddish In Color and Include Jaffa, Forbesville and Manzanita Soils.
  • Alluvial Valley– Formed by River Movement and Include Sand, Silt and Clay Soils.

CLIMATE Continental, Extreme Temperatures Moderated by Thermal Mass of Clear Lake.

  • Summers– Warm, Long, Cool Nights   |    Winters– Cold, Wet
  • +Diuranal Shifts(+40°) Lake County Rarely Experiences Coastal or Valley Fog.
  • +MICRO-CLIMATE– Geography & Topography
  • +CLEAN AIR– Rated Cleanest Air In America. (Lack of Fine Paricle Polluiton)

VITICULTURE 168,000 ac./ 9,500 ac. Planted

  • BENEFITS– Extreme Temperate (Highs/ Lows),
    • +Humidity(Little Disease Pressure and Few Pests Can Tolerate Climate.)
  • CHALLENGES– Compact Growing Period, Late Bud-Break, Early Ripening.
    • Spring/ Fall Frost Can Be an Issue.


  • 1870 @Lake County Viticulture, First Vineyards
  • 1900 @Lake County Strong Wine Industry Throughout Lake County.
  • 1909 @Lake County Had 600 Acres of Vineyards.
  • 1920 @Lake County Prohibition, Puts an End to Growing Wine Industry.
  • 1960 @Lake County Re-Emergence, Wine Industry Starts Growing Again.
  • 2000 @Lake County Investment, Increased In Promoting and Establishing New Vineyards.


  • PIONEERS~Lilly Langtry~  1854, Guenoc Valley, One of First to Plant Vines In Lake County.
    • ~Charles Hammond~ 1893, Won Best American, Red Wine at World Exposition.
    • ~T.H. Buckingham~ 
    • ~Ogulin Family~ 1870, Planted Vineyards In High Valley.
    • ~George Wrey~  1884, One of First to Buy Land and Plant Vineyards.
  • ASSOCIATIONS~  ~Lake Country Winegrape Growers~
  • FESTIVALS~ ~Lake County Wine Adventure~(May/ Lake County)
  • AGRICULTURE~ Pears, Walnut
  • BUSINESS~ ~Master Vigneron Academy~ MVA.-
    • Mission~ Professional Workforce Development Program Designed Specifically For Experienced Vineyard Supervisors and Foreman. Designed to Provide an In-Depth Understanding About the Supervisor’s Role and Responsibilities In Implementation Quality Wine-Growing Practices and Improving Farm Workers Productivity. This Program is Exclusively Taught In Lake County
  • Axis of Cab Monicker Given to North to South Direction of Superior Growing Conditions for Cabernet Sauvignon Between the Mayacamas and Vacca Mountain Ranges. This Axis Runs From Northern Lake County to Southern Napa County.

LAKE COUNTY     @Entire County

  • WHITE=   |   RED=   **Refer to AVA’s For Information On Variety %.
  • VITICULTURELabeled “LAKE COUNTY”  Refers to Wines Non-Conforming to an AVA.
    • Estates/ Producers(Not Located In Designated AVA.)  Bad Rat, Eden Crest, Hawk & Horse,  Mount Konocti Growers, Steele, Six Sigma(40ac.),  Shannon Ridge, Wildhurst
    • Vineyards– Lushsinger, Snows Lake

UPPER LAKE VALLEY AVA. (Un-Official)      @

  • WHITE= Chardonnay, Muscat Canelli, Sauvignon Blanc
  • RED= Cabernet Sauvignon
  • GEOGRAPHY– California, REGION-Clear Lake, COUNTY-Lake, Clear Lake AVA.(    )
  • TOPOGRAPHY– “Rolling/ Hilly”
  • CLIMATE– “Continental“, +DIURNAL SHIFTS
  • SOILS– Metamorphic, Volcanic
  • VITICULTURE– 17,360 ac./  ? ac. Planted
    • Estate/ Producers
    • Vineyards– Elk Mountain

HIGH VALLEY AVA.     @Clearlake Oaks

  • WHITE= Chardonnay, Gewurztraminor, Orange Muscat, Pinot Grigio, Riesling, Sauvignon Blanc, Viognier
  • RED= Cabernet Franc, Cabernet Sauvignon, Grenache, Malbec, Mourvèdre, Petite Sirah, Petiti Verdot, Pinot Noir, Syrah, Tempranillo, Zinfandel
  • GEOGRAPHY– California, REGION-Clear Lake, COUNTY-Lake, @Hw.#20
    • In Clear Lake AVA.(North-East),  (9 Miles Long & 3 Mile Wide)
    • Sub-Zones: The Volcanic Ridge
  • TOPOGRAPHY– “Flat/ Rolling/ Valley(High ‘Transverse’)”, On~Clear~Lake~(North-East)
    • SLOPES/ Round Mountain Volcano(Cinder Cone) , +Alt.1,800 ft.-2,900 ft.
    • Small, Flat Plain Surrounded by Mountains
    • High Valley is a Watershed to Clear Lake, Once Blocked by Volcanic Activity the Entire Valley Became a Lake, This Left Alluvial Soils Throughout
    • Sub-Zones: Valley Floor & Hillsides
    • VOLCANISM– Round Mountain Volcano– +Alt.3,599 ft.
  • SOILS= “Metamorphic”, “Volcanic”(Volcanic Shale, Franciscan Shale)
    • Sedimentary”, Alluvial Sandy Loams, Lupoyoma Series, ~Mayacamus Series~
    • Gravelly Loams Eroded Franciscan Shales, Orange-Black Volcanic Sand & Tephra
  • CLIMATE= “Continental“, +DIURNAL SHIFTS 50*
    • +WINDS/ Wind Machine- 2 Gaps In West Valley Allow Lake Moisture In Valley
  • VITICULTURE– 14,000 ac./ 977 ac. Planted
    • Estates/ Producers– Brassfield(2,700ac.)
    • Vineyards– High Serenity Ranch, High Valley, Monte Sereno, Perspective, Volcanic Ridge
    • PIONEERS~ ~Ogulin Family~ 1870, Planted Vineyards In High Valley

LONG VALLEY AVA. (Un-Official)       @

  • WHITE= Chardonnay, Sauvignon Blanc
  • RED= Cabernet Sauvignon, Malbec, Petite Sirah, Syrah
  • GEOGRAPHY– California, REGION-Clear Lake, COUNTY-Lake, @Old Long Valley Rd.
    • Clear Lake AVA.(East)
  • TOPOGRAPHY– “Flat/ Rolling/ Canyon/ Valley(Long)”
  • CLIMATE– “Continental
  • SOILS– “Metamorphic”, “Volcanic
  • VITICULTURE–  7,605 ac./
    • Estate/ Producers– Beaver Creek, Cache Creek, Noggle


  • WHITE= Chardonnay, Muscat Canelli, Riesling, Sauvignon Blanc, Semillon,
  • RED= Barbera, Cabernet Franc, Cabernet Sauvignon, Charbono, Malbec, Merlot, Nebbiolo, Souzao, Syrah,
    Petit Verdot, Tempranillo, Tinta Cao, Touriga Nacional, Zinfandel
  • GEOGRAPHY– California, REGION-Clear Lake, COUNTY-Lake, @Hw.#29
    • In Clear Lake AVA., Part of Clear Lake Basin
    • BORDERS: On~Clear~Lake~(South-West), North-West of Kelseyville-City(    mi.)
  • TOPOGRAPHY– “Rolling/ Valley”
    • “Basin Within a Larger Clear Lake Basin”, On~Kelsey~Creek~
    • SLOPES/ Mayacamas Mts.(East), +Alt.1,300 ft. to 1,500 ft.(Peak 4,305 ft.),Mt. Konocti
    • Kelsey Tuff– Aquifer Fromed by Volcanic Ash and Tuff
  • SOILS= “Metamorphic”, “Volcanic”, Gravel, Sand, Silt, Loam, Clay
  • CLIMATE= “Continental+Diurnal Shifts(+40°)
  • VITICULTURE– 11,000 ac./ 216 acPlanted
    • Estates/ Producers– Gregory Graham
    • Vineyards– Bartolucci, Luchsinger, Sawyer, Windrem

KELSEY BENCH AVA.     @Kelseyville

  • WHITE= Chardonnay, Riesling, Sauvignon Blanc, Viognier
  • RED= Cabernet Franc, Cabernet Sauvignon, Merlot, Montepulciano, Zinfandel
  • GEOGRAPHY– California, REGION-Clear Lake, COUNTY-Lake, @Hw.#29
    • In Clear Lake AVA., South-West of Kelseyville-City(    mi.)
  • TOPOGRAPHY– “Flat/ Rolling”, On~Clear~Lake~(South/ Near), +Alt.1,400 ft.-1,600 ft.
    • Transition Between Vocanic Mountains and Alluvial Flood Plain of Lake
    • Bench Sits On Big Valley Fault
    • Kelseyville Formation/ Bench- Facustrine and Fluvial Beds Exposed Near Kelsyville
  • SOILS= “Metamorphic”, “Volcanic”, “Sedimentary“, Alluvial, Clay-Loam, Gravel,
    • ~Kelseyville Formation~
  • CLIMATE= “Continental“, +DIURNAL SHIFTS
  • VITICULTURE– 9,100 ac./ 900 acPlanted
    • Estates/ Producers– Burton Ranch, Devoto, Nora, Oakie Slopes, Prima Materia, Rosa D-ora, Wildhurst
    • Vineyards– Catfish(HVS.), Fore Familiy

RED HILLS AVA.     @Lakeport

  • WHITE= Chardonnay, Sauvignon Blanc
  • RED= Barbera, Counoise, Cabernet Franc, Cabernet Sauvignon, Counoise, Cinsault, Charbono, Grenache, Malbec, Petite Sirah, Petit Verdot, Primitivo, Syrah, Tempranillo, Zinfandel
  • GEOGRAPHY– California, REGION-Clear Lake, COUNTY-Lake, @Hw.#29
    • In Clear Lake AVA.(South-West)
  • TOPOGRAPHY– “Hilly/ Mountainous”, On~Clear~Lake~(South)
    • SLOPES/ Mayacamas Mountains, +Alt.1,350 ft.-2,700 ft.(Peak 3,700 ft.)
    • North-Coast Lava Pocket, Dozens of Volcanic Formed Hills, Mt. Hannah(Peak 2,595 ft.)
  • SOILS= “Metamorphic”, “Volcanic
    • Aiken/ Weathered Basalt, Quarts, Glenview-Bottlerock, Konacti-Benridge, Collayomi -Aiken
    • Obsidian(Black Volcanic Glass/ Magma That Oozed Out of Volcano and Cooled quickly In the Open /Air)
  • CLIMATE= “Continental“, +DIURNAL SHIFTS,   +RAIN/ 25 in.-45 in.
  • VITICULTURE– 31,250 ac./ 3,250 acPlanted
    • Estates/ Producers– Cougar’s Leap, Gregory Graham, Fore Family, Laujor, Moore Family, Obsidian Ridge(250ac.), Sol Rouge(6ac.), Thorn Hill, Vigilance
    • Vineyards– Amber Knolls, Beckstoffer, Crimson Ridge, St. Olof


  • WHITE= Chardonnay, Sauvignon Blanc
  • RED= Cabernet Sauvignon, Syrah, Zinfandel
  • GEOGRAPHY– California, REGION-Clear Lake, COUNTY-Lake, @Hw.#175
    • West of Clear Lake AVA., East of Hopland-City(     km.)
  • TOPOGRAPHY– “Hill/ Mountainous/ Valley(Benmore)”, +Alt.2,400 ft. to 2,700 ft.
  • SOILS= “Metamorphic”, “Volcanic”, “Sedimentary“, Manzanita Loam
  • CLIMATE= “Continental“, +DIURNAL SHIFTS, Cooler Than Other Clear Lake AVA.‘s
  • VITICULTURE–    ? acPlanted
    • Estates/ Producers– Sourced by Geyer Peak
  • CULTURE–  PIONEERS~ ~Benjamin Moore~ 1800’s, Cattle Rustler

GUENOC VALLEY AVA.     @Middletown

  • WHITE= Chardonnay, Marsanne, Sauvignon Blanc, Semillon, Viognier
  • RED= Cabernet Franc, Cabernet Sauvignon, Grenache, Merlot, Mourvedre, Petite Verdot, Pinot Noir, Syrah, Tempranillo, Zinfandel
  • GEOGRAPHY– California, REGION-Clear Lake, COUNTY-Lake(South-East), @Hw.#29
    • South of Clear Lake AVA., East of Middletown-City(     mi.), North of Calastoga-City(20 mi.)
  • TOPOGRAPHY– “Rolling/ Valley(Guenoc)”, +Alt.800 ft.-1,700 ft.
    • Sub-Zones: Butts Canyon
  • SOILS= “Metamorphic”, “Volcanic”, “Sedimentary”, Alluvial, Arroyo Seco, Conejo Loam Series, Tuffa, Ash
    •  Cole & Maxwell Clay Loams
  • CLIMATE= “Continental
  • VITICULTURE– 4,340 ac./ 340 ac., Planted
    • Monopole-, Extremely Hot, Over Ripening a Concern
    • Estates/ Producers– Banshee, Guenoc, Langtry Estate
  • HISTORY1854 @Guenoc Valley– “Rancho Guenoc“, Part of Original Mexican Land Grant.

NORTH COAST AVA.   @Lake County

  • WHITE=   |   RED= **Refer to AVA. For Grape Information
  • GEOGRAPHY– California, Northern California
    • COUNTIES: (AVA. Laps)Mendocino County, Napa County, Sonoma County
  • VITICULTURE– Wine Produced In “NORTH COAST” Non-Conforming to an AVA.
    • Grapes Can Source From Mendocino, Sonoma, Lake and Napa Counties.

**Refer to “BIBLIOGRAPHY/ SOURCES” For Details On Scholarly Works Referenced.