Lake Berryessa Loop

The Lake Berryessa Loop is generally considered a difficult road cycling route. While a common loop of about 45 miles is manageable for competent cyclists, longer variations (around 66 miles with over 4,600 feet of elevation gain) are classified as 'Hard' and require a very good level of fitness. Be prepared for significant climbs and descents, including sections like 'Cardiac Hill' with gradients up to 6.3% and other climbs reaching 7.2%.

The loop primarily features well-paved roads suitable for road cycling. However, you should expect significant elevation changes, including challenging climbs and steep descents. While mostly smooth, some longer or more challenging variations might include unpaved sections where you may need to dismount. Roads can occasionally be shoulderless, requiring caution with vehicle traffic. You'll also traverse pleasant valleys with wide, smooth roads.

The route offers diverse and picturesque scenery. You'll enjoy panoramic views of Lake Berryessa, especially from elevated points. The ride winds through valley woodlands, expansive vineyards in areas like Lower Chiles Valley, and golden hills. You'll also encounter oak forests, picturesque stone walls, and unique landmarks such as the 'Glory Hole' spillway at Monticello Dam.

The best times to cycle this loop are during spring and fall. The weather is generally agreeable, and the roads are less crowded. It's advisable to avoid busy summer weekends due to increased traffic, especially with boat trailers, and potentially extreme heat, with temperatures sometimes reaching 100-110 degrees Fahrenheit.

Yes, beyond the significant elevation changes, be aware of 'Cardiac Hill' (a 1.7-mile climb with a 6.3% gradient). A unique feature is a section of Berryessa Knoxville Road where, in spring, the road goes directly through Eticuera Creek instead of over a bridge. Also, some roads can be shoulderless, requiring extra vigilance for vehicle traffic.

While there isn't one single designated trailhead parking lot for the entire loop, cyclists often start from various points around the lake. Along the west shore, you can find various establishments, including delis and marinas, which may offer parking options. It's best to research specific starting points based on your preferred section of the loop.

As this is primarily a road cycling route on public roads with vehicle traffic, it is generally not suitable or recommended for cycling with dogs. There are no specific provisions for dogs mentioned for this route.

No, typically you do not need any special permits or have to pay entrance fees to cycle the Lake Berryessa Loop, as it primarily uses public roads.

Yes, along the west shore of Lake Berryessa, cyclists can find various establishments offering food and water, including delis and marinas. It's still wise to carry sufficient water and snacks, especially for longer stretches between these points.

Yes, the route also passes through very small sections of the Smittle Creek Trail and the Cedar Roughs Trail, though these are minimal portions of the overall road cycling loop.