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Length 9.5 miles
Time 3 hours
Total Climb 2050 feet
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Aerobic Difficulty
Technical Difficulty 

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Skyline Wilderness (Suggestion 2)


I'm sure most local riders would agree that Skyline Wilderness Park is one of the few parks in the North Bay with first-class technical singletrack. The trail network in this park is not exactly huge (some recent texts state its total trail length as 25 miles) but, with a handful of exceptions, all of the trails here (most of which are deliciously technical singletrack) are open to bikes.

This is not a ride that can be recommended to beginners, unless what they're interested in is taking a close look at what highly technical trail riding is like and they're okay with having to walk much of the route for the sake of that. Many of the trails are full of seriously narrow and rocky sections, drops, steps, steep and loose stretches, and combinations of these. Other than short stretches here and there, this ride is bound to be a source of nothing but frustration to inexperienced riders.

For the same reason, the place might qualify as a hard-core mountain biker heaven, though one with a relatively small selection of trails! And we don't have too many places around the Bay Area for which that can be said. Comparisons with places like Skeggs Point, Annadel, and Soquel Demonstration Forest are inevitable; but even in those places, the technical features of the trails aren't always as incessant and as tightly packed as they are here, in my opinion.

Skyline Wilderness Park opens at 8:00 AM. There's no way to enter the park anywhere around its main entrance unless you're willing to scale fences blatantly. However, a reader has tipped me off that, if you're inclined to plan a ride here that will start really early in the morning, you can legally enter the park from Route 221 via the River-to-Ridge Trail. You can also park in the nearby free parking lot of that trail, which is reachable from Streblow Drive.

Parking in the park's own lot is subject to a fee. As of this writing, the fee for cars carrying mountain bikes is $6. More than four people and more than two bikes per car are subject to additional charges. I didn't see any self-pay system, but the point is moot anyway, since you can't enter the parking lot before the opening time. Although a free alternative is available, I hope that you can opt to use the paid parking lot as a way of supporting this very mountain-biker-friendly park that is quite unique in the way it is maintained entirely by volunteers. The success of this "experiment" could only spell good news for all of us in terms of better access to other such good trails in the future. Meanwhile, if the River-to-Ridge Trail entrance happens to work better for you but you'd still like to support the park, another way of doing it is to purchase an annual pass.


This particular route is merely an updated/augmented version of the first Skyline Wilderness ride suggestion I have listed. This one does the initial climb at the beginning of the ride on the more preferred (in my opinion) Buckeye Trail rather than Lower Skyline Trail, and it appends the "Tuteur Loop" to the main loop, whose existence I wasn't even aware of when I had done the first ride. There's also a segment of Skyline Trail, near the junction where it meets with Buckeye Trail and Passini Road, that has been re-routed since my earlier ride here. This newer ride represents the updated course of that segment.

Despite the high similarity of the two routes, I'm opting to keep them represented on this site as two distinct choices, with the additional consideration that the two separate photo sets of these two rides, when put together, will provide even better pictorial coverage of the trails here. Besides, given the limited selection of trails at Skyline Wilderness, any two ride options here are bound to have substantial overlap anyway.

As I already mentioned, this ride starts out by climbing the first hill in the ride via Buckeye Trail. This is a pleasant singletrack that climbs at a significant grade (not higher than 15%, with only short segments approaching 20%), but not so steep as to give a hard time to any riders in good shape. And it constitutes really the only serious climb of the entire ride. After you make it to Skyline Trail and then back to Buckeye Trail to follow it up the canyon along Marie Creek, you keep gaining elevation but at a more reasonable rate. This part of the ride is a fun but not very technical singletrack.

As Buckeye Trail drops you back onto Skyline Trail for the last time as you near Lake Marie, a gentle fire road descent starts. The glide down this beautifully wooded fire road is so gentle that you can't even coast. This lasts for less than a mile and ends when the trail drops you onto a crossing of Marie Creek. Following Skyline Trail further up from that crossing will take you to an additional sub-loop (called "Tuteur Loop", apparently) along the Napa-Solano Ridge Trail. Bypassing this segment (to turn back immediately via Chaparral Trail from this spot) would save you 2.5 miles of riding and over 400 feet of climbing, but I wouldn't recommend it unless you're really pressed for time. Not only is this portion of Skyline Trail (especially its lower parts) exposed to the sights of the very scenically rocky Marie Creek bed, but the sub-loop itself feels like it was designed with nothing but the enjoyment of mountain bikers in mind. It's a narrow, non-technical singletrack trail that climbs at a moderate grade (hovering around 8%) and joyfully zigzags along much of its length, before gliding down across some meadows (when done counter-clockwise, as on this ride).

On your way back, what awaits you is the more technical half of the ride. There is no shortage of loose, steep, and rocky stretches of Upper Marie Creek Trail, and the higher parts of Manzanita Trail are peppered with rock and log steps. Meanwhile, the part of Marie Creek Trail that coincides almost completely with the creek itself are very playful, frequently rocky, and nearly guaranteed to get you a little wet when there's a lot of water in the creek.

There are a handful of points of interest along the ride. There's the chimney and foundation of an old house visible right next to the trail near the southeastern extreme of Skyline Trail. An ancient fig tree (said to be still producing edible fruit) can be found near Lower Marie Creek Trail. And, of course, there are the pretty views presented by Lake Marie, as well as some nice views to Napa Valley and the upper reaches of the Bay opening up from here and there. But, clearly, the main attractions here are the technical features of the trails, and you usually won't have time to pay attention to much else.

© Ergin Guney


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