Mendocino Ridge AVA

Italian immigrant homesteaders arrived on the Mendocino coastal ridgelines in the late 1800s, planting Zinfandel along Fish Rock Road and surrounding ridges. Families including the Ciapusci, Gianoli, Perli, and Zeni were among the earliest viticulturalists, establishing vineyards that remain in production today. The AVA was formally created on October 27, 1997, when the Bureau of Alcohol, Tobacco and Firearms established it as proposed by Steve Alden of Alden Ranch Vineyards on behalf of the Mendocino Ridge Quality Alliance. Alden and Dan Dooling of Mariah Vineyards were co-architects of the AVA, working covertly to prevent the region's ridgetops from being absorbed into the neighboring Yorkville Highlands AVA petition.

• Italian homesteader families including the Perli, Zeni, and Gianoli clans planted Zinfandel on the coastal ridges in the late 1800s, establishing the region's viticultural heritage
• Steve Alden of Alden Ranch Vineyards and Dan Dooling of Mariah Vineyards jointly petitioned for AVA status, maintaining secrecy to protect their ridgetop sites from inclusion in the Yorkville Highlands petition
• Jed Steele began making wine from old Mendocino Ridge Zinfandel vines at Edmeades Winery in Anderson Valley in the early 1970s, helping keep heritage vineyards commercially viable
• In January 2024, the AVA Board of Directors petitioned the TTB to rename the appellation 'Mendocino Coast Ridge,' arguing the coastal identity is as defining as the ridgeline geography

Mendocino Ridge spans a ridge system between the Pacific Ocean and Anderson Valley, with roughly 36 miles of the southernmost Mendocino coastline forming the western boundary, the Sonoma County line as the southern boundary, the Navarro River as the northern boundary, and Anderson Valley as the inland boundary. The AVA is a collection of 24 named ridgetops; vineyards can be found as high as 2,600 feet, but only those at or above 1,200 feet qualify for the appellation. The ridgetops rise above the marine fog layer that blankets the valleys and lower slopes, giving vineyards long sunshine hours while Pacific breezes moderate afternoon temperatures. The climate is cool and coastal, with relatively high annual rainfall of 1,000 to 2,500 mm, a long growing season, and cool, wet winters with occasional snowfall.

• The AVA's outer boundary covers 262,400 acres, but only sites above 1,200 feet are included, resulting in non-contiguous ridgetop parcels floating above the fog line
• Average growing-season high of 75.9°F and low of 49.4°F; daytime highs are often 10 degrees cooler than in the adjacent Anderson Valley
• Steep hillsides, often exceeding 70% grade and covered in Redwood and Douglas Fir, render the majority of land unfit for viticulture
• Signal Ridge Vineyard, at 835 meters (2,740 feet), is the highest vineyard site in all of Mendocino County

Zinfandel is historically the oldest and most culturally significant grape in the AVA, planted by Italian homesteaders in the late 1800s and celebrated for a century as the region's signature variety. Since the 1990s, Pinot Noir has become the most commonly planted grape, with the cool coastal climate and high-elevation sites proving well suited to the variety. Chardonnay is also gaining recognition, with wines noted for crisp minerality and bright acidity. Secondary plantings include Syrah, Merlot, Riesling, Sauvignon Blanc, Primitivo, Petite Sirah, Cabernet Sauvignon, and Gruner Veltliner, listed in order of decreasing planted acreage.

• Zinfandel is the oldest planted variety, rooted in 19th-century Italian immigrant tradition; old-vine blocks from the Perli, Zeni, and DuPratt heritage clones produce concentrated, age-worthy wines
• Pinot Noir is now the most commonly planted grape; wines typically show pale to medium color with rich texture, bright acidity, and savory, mineral-driven complexity
• Chardonnay from high-elevation blocks such as Perli Vineyards at 2,000 feet shows concentrated stone fruit with crisp structure; wines are described by critics as mineral-driven and food-friendly
• The stressed, low-vigor vines on shallow timber soils produce small berries with thick skins and intensely concentrated flavors across all varieties

Only four grower-producers operate wineries within the AVA's remote boundaries: Mariah Vineyards, Murder Ridge (using Perli Vineyards), Drew, and Baxter Winery. Mariah Vineyards, founded in 1979 by Dan and Vicki Dooling at 2,400 feet near Point Arena, is one of the AVA's pioneering estates and the first Savory Institute Global Land to Market Verified regenerative vineyard. Murder Ridge Wines, led by Steve Alden at Perli Vineyards, produces small-lot Pinot Noir, Chardonnay, Syrah, and Zinfandel from elevations between 1,450 and 2,215 feet. Many additional celebrated producers source fruit from the AVA's key vineyards, including Turley, Kutch, Waits-Mast, Arnot-Roberts, Donkey and Goat, and Las Jaras.

• Murder Ridge Wines crafts Pinot Noir, Chardonnay, Syrah, and Zinfandel from Perli Vineyards, with individual blocks ranging from 1,450 to 2,215 feet elevation and production of around 40-72 cases per bottling
• Mariah Vineyards, founded 1979 by Dan and Vicki Dooling at 2,400 feet, dry-farms Zinfandel, Pinot Noir, Sauvignon Blanc, and Chardonnay; it became the world's first Land to Market verified regenerative vineyard in 2020
• Noteworthy vineyards supplying multiple producers include DuPratt, Manchester Ridge, Signal Ridge, Perli, Valenti, Fashauer, and Sky High Ranch
• External producers sourcing AVA fruit include Turley Wine Cellars, Kutch Wines, Waits-Mast Family Cellars, Arnot-Roberts, and Donkey and Goat

Mendocino Ridge AVA was established under Title 27 CFR Part 9 by the Bureau of Alcohol, Tobacco and Firearms (T.D. ATF-392, published October 27, 1997). It sits within the broader North Coast AVA and partially overlaps Anderson Valley and the Mendocino AVA in its northeastern corner. The appellation's defining legal feature is its elevation threshold: only land at or above 1,200 feet is included within the AVA, regardless of whether it is geographically contiguous with other qualifying parcels. This precedent-setting mechanism makes Mendocino Ridge the only non-contiguous AVA in the United States and the first of its kind globally. In 2024, a renaming petition to 'Mendocino Coast Ridge' entered the public comment period; as of early 2026 no final rule has been published.

• Established October 27, 1997 via T.D. ATF-392 (62 FR 55512); petition originated from Steve Alden of Alden Ranch Vineyards on behalf of the Mendocino Ridge Quality Alliance
• Elevation threshold of 1,200 feet (366 m) is the sole qualifying criterion; contiguous geography is not required, making this the only non-contiguous AVA in the US
• Of 262,400 total boundary acres, only about 87,466 acres lie above 1,200 feet; of those, just 1,500 to 2,000 acres are suitable for viticulture
• A 2024 TTB proposal (Docket TTB-2023-0009) would rename the AVA 'Mendocino Coast Ridge'; producers cited marketplace confusion between the appellation and an unrelated Pacific Ocean underwater ridge

Mendocino Ridge's remote ridgeline terrain makes it one of California's least-touristed wine regions. Roads such as Fish Rock Road, Greenwood Ridge Road, and Mountain View Road wind steeply up from Highway 128 to reach the producing vineyards, and many properties require advance appointments. The landscape is dramatic, with Redwood and Douglas Fir forests surrounding the vineyard clearings, and encounters with wildlife, including bears, wild boar, and turkeys, are common. Boonville and Philo in Anderson Valley are the nearest towns offering lodging, restaurants, and hospitality services, while the coastal town of Point Arena provides access to Mariah Vineyards.

• Fish Rock Road in the southern portion of the AVA was the center of Italian homesteader activity in the 1800s and remains the route to several historic vineyards
• Most producers require advance appointments; the very small case productions mean wines are primarily sold direct-to-consumer or through specialty retailers
• Boonville and Philo in Anderson Valley are the closest towns with full hospitality services, roughly 30 to 45 minutes from most ridgetop vineyards
• The region is notorious for extreme wind and rain, which are the primary viticultural challenges alongside wildlife pressure and the logistical difficulty of farming steep terrain