Inland Empire Grape Harvest Festival

Inland Empire Grape Harvest Festival is an annual harvest wine festival held in Ontario, California at Guasti Regional Park — a family-friendly event celebrating the Cucamonga Valley's grape-growing and winemaking heritage, which dates back to the late 1800s. Organized by BierBuzz® Events, the festival runs from 11am to 11pm, with live music continuing until 10pm, giving attendees a full day of activity in the Inland Empire region of Southern California.

The Inland Empire Grape Harvest Festival is rooted in a tradition of harvest celebrations that have taken place in the Cucamonga Valley for over 120 years, making it one of the region's most historically grounded wine events. Beyond wine and beer gardens — where wine is served in 5oz pours and beer in 16oz pints — the festival features grape stomping, pie eating contests, and fair-style activities. Separate large stomp tanks are available so families can participate in grape stomping outside of the formal contest. Contest sign-ups for both the pie eating and grape stomping competitions open 30 minutes before each event and are filled on a first-come, first-served basis. Participants in contests must be at least 14 years old, and those under 18 require a guardian's signature.

Attendees should plan for a few practical details before arriving. Guasti Regional Park charges $10 entry per car or $3 for walk-in access — this is separate from any event ticket cost. Pre-sale drink tickets are available online at a discount and are redeemed at BierBuzz® booths inside the main entrance. No outside food, drinks, or coolers are permitted, and no pets are allowed except certified service animals. Alcohol purchase and consumption requires guests to be 21 or older, though the overall event is open to all ages.

The Cucamonga Valley AVA, located in San Bernardino County, has a long history of viticulture supported by its sandy soils and warm inland climate. The region was once one of California's largest wine-producing areas, and the Inland Empire Grape Harvest Festival directly honors that legacy by centering the annual grape harvest as its main occasion.