It's no exaggeration that the Orestimba Wilderness is one of the most remote areas of the Diablo Range, if not the entire Coastal Ranges of California. In the far flung north eastern arm of Henry W. Coe National Park's area rivals that of the High Sierra in isolation and difficulty of access. For much of the year, it's a 30-40 mile trip just to get to the doorstep from the park's two main trailheads, Coe Ranch and Hunting Hollow. Getting high into the backcountry would involve a 50-mile round trip with 5,000-6,000ft of gain and loss. The inconsistently open Dowdy Ranch Station gets you the closest but it's still a 12 mile round trip with well over 1,500 feet of gain and loss to reach the entrance. Furthermore, the trails are largely unmaintained, and water is only consistent during the winter and spring in wet years.
The preparation, planning and hazards make it essentially inaccessible for most of the year. However, the Pine Ridge Association opens the backcountry to driving once per year allowing for a very narrow window of opportunity to backpack the Orestimba Wilderness. I finally got the opportunity in April 2026. Since information online is extremely scant online, consider this an update on conditions and what to expect.
Overview of the Orestimba Wilderness
The Orestimba Wilderness essentially matches the same criteria of nationally designated wilderness areas with only hiking and horseback riding permitted. There's only a handful of trails and most of them are unmaintained. Access is seemingly unrestricted but contact the park office for backcountry camping permits.
I doubt anyone beyond a few very hardy souls goes to that part of the park outside of Backcountry Weekend. This occurs annually in April. Its open to the public but spots do fill up. The cost was $100 when I went in April 2026. I secured a permit for Orestimba Corral for the parking. This is the furthest you can drive on Kaiser-Aetna Road. Note the last mile or so is a 4x4 road- my Subaru had no difficulties but a Prius or Civic would be doubtful.
There are absolutely no services of any kind within the wilderness. Signposts with mileages are inconsistent at best. Backcountry camping abounds but water access limits the better sites. On the eastern side of the wilderness (near Rooster Comb and Orestimba Creek) the creek seems to run regularly during winter and spring. The central and western portions of the wilderness had much less consistent water, even during the relatively wet April we had in 2026.
Here's a suggested lollipop route that sticks to more established areas and would take 2-3 days for an experienced hiker:
And here's my GPS track that included Robison Mountain and Mt Stakes:
I'll write separate posts for Robison Mountain and Mt Stakes given they aren't typically targets of those backpacking the Orestimba Wilderness. For now, let me break down conditions and field notes from my trip.
Field Notes from My Trip
Orestimba Creek Area
Starting at Orestimba Corral, I was surprised how well-managed the backcountry site was. Rangers and volunteers were everywhere. It was also rather busy. I gathered my things and set off on Orestimba Creek Road—the main access route for the backcountry.
Orestimba Creek Road was rolling with ups and downs but generally descends for the first 5 miles to the first major intersection with Red Creek Trail. It was very wet and somwhat flooded. Some sections had calf-deep water but there was always a way to detour. There were many backpackers on this route—most were heading to Jackrabbit Lake, Mustang Lake or Paradise Flat. All those sites are nice spots for camping but don't really expose you to the interior of the wilderness.
Past the Red Creek Trail, Orestimba Creek Trail heads north under the shadow of Rooster Comb. This unmistakable rocky ridge dominates the horizon for much of the front country. After 1/2 a mile, the road hits a very well-signed barrier indicating private property. You must take the rough and ambiguous Rooster Comb Trail from here.
Rooster Comb Trail, Robison Peak and Orestimba Creek Trail Redux
Had a ranger not been present, I might have missed the junction with Rooster Comb Trail. This 3-mile section was a great sampler of what's to come. The route was extremely brushy, ambiguous in sections and quite buggy. 100% deet was a must for tics. Lots of ups-and-downs without any meaningful altitude gain made for slow going. I was following a pre-loaded GPS route which was also essential. Otherwise it would have been a completely overland trip through rough coastal chapparal.
I ended up hiking Robison Mountain from Rooster Comb Trail which I'll cover in a separate post. The long-and-short of it is - very steep route without any trail and oceans of chamise. Not recommended unless you're a peakbagger (like me).
Eventually Rooster Comb Trail drops back down on Orestimba Creek Trail, which is an active ranching road. Pleasant backcountry camping spots lined the nearby trail and creek. Water was abundant here in April 2026.
Robison Creek Trail
After approximately 10.5 miles of hiking from Orestimba Corral, the trail reached a 4-way intersection with Robison Creek Trail (heading west) and two unnamed trails heading north and east. This was the last of ranch roads—from here it was basically following a semblance of a herd path but relying mostly on navigation and knowledge.
Robison Creek Trail follows it's namesake in a generally westerly direction for about 1.8 miles between Orestimba Creek and Pinto Creek. The route was very rough with lots of deadfall. Some sections were ambiguous but I just followed the creek until I picked up a clear enough section to constitute a trail. I'm sure these trails were cut at some point, decades ago.
After about a mile, the trail enters a serene and very open valley, a sight that defined the Orestimba Wilderness to me. The pancake-flat basin of the valley had excellent camping options though water was very scarce. At one point I worried that I'd need to double back to refill. Fortunately there was enough of a trickle to filter water out of Pinto Creek.
I camped at the intersection of Pinto Creek and Robison Creek for the night. It was lovely-
The next day, I climbed Mt Stakes via Pinto Creek. Though I've bushwhacked dozens of mountains in the Northeast and Coastal California, I've never encountered a more difficult route than Pinto Creek. I'll describe that it a separate post.
For the more "normal" backcountry route, Robison Creek Trail turns southwest after the intersection with Pinto Creek. High grass and endless creek crossings made for slow going. At some point I was just following the path of least resistance rather than any formal route.
At a completely indistinguishable point 2.2 miles from the Pinto Creek Junction, the route climbs the valley out of Robison Creek to a higher saddle. It was rough going but eventually I climbed to a high point and a more discrete trail appears. Note its about a 500' climb from Pinto Creek to the saddle.
I dropped down from the saddle, eventually joining the equally ambiguous Red Creek Trail. It was 5.5 miles from Orestimba Creek Trail to Red Creek Trail via Robison Creek Trail. However it felt like 20 miles given the arduousness of it.
I camped the night at the junction with Red Creek Trail. Red Creek itself had a trickle of water but enough to pump/filter for the day.
Red Creek Trail
Comparatively speaking, Red Creek Trail was more clear than Robsion Creek Trail. But at that point I'd hiked over 30 miles (climbing Robison Peak and Mt Stakes) so I felt pretty spent. Though water sources felt inconsistent on the route, I still had dozens of difficult water crossings. None of it was swift water but it was deep, muddy and slippery in the back half of Red Creek Trail.
After about 2.2 miles of bushwhacking and wading through high grass from the intersection with Robison Creek Trail, Red Creek Trail leaves its namesake and climbs some gentler slopes near what was once Paradise Lake (the dam broke years ago, it doesn't hold water). It was a welcome reprieve- suddenly the route was now a ranch road and left the tics and critters behind. The trail crests near paradise flats, which is a disused landing strip and more popular spot for camping. I saw the first people I'd seen since a few days ago.
From Paradise Flats, the trail drops back down to Orestimba Creek Trail near Rooster Comb.
The return to Orestimba Corral was a straightforward 5 mile walk back on Orestimba Creek. I was back to the car after about 60-ish hours of hiking and overnight-ing.
Final Thoughts
It was one of the harder backpacking trips I've done given the challenges with routefinding and navigation. Including Robison Peak and Mt Stakes, the loop was almost 45 miles and about 1/2 of that distance was covered through bushwhacking or overland hiking.
Water sources in Henry Coe State Park are almost always variable outside of the several lakes and reservoirs that dot the landscape. Some of the creeks had abundant running water while others had trickles that dissipated into dry arroyos. While I was never truly far from water, the inconsistency meant frequently pumping when I could. I used a standard backpacking water filter and was fine.
Tics are the boogeyman of this type of hiking. I encountered dozens of them but Lyme Disease is not common in Henry Coe. The risk certainly isn't zero and other tic-borne diseases exist so wearing lots of bug repellant was necessary.
I brought a (heavy) bear cannister just in case. In retrospect, it's unlikely I would have run into a bear. I could have gotten away with something much lighter and less bear-proof.
Well, hope this is helpful information on the Henry Coe backcountry - seems like its been over a decade that anyone has posted anything about it. Feel free to comment or reach out to me if you have updates or different experiences.
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