Palouse To Cascades Trail: Rock Lake

“You can’t go there. The tunnels are totally caved in and all the bridges have collapsed. Take the detour.”

-An owner of land along Rock Lake, telling me about the trail in 2019

Rock Lake is an enigma of the Palouse To Cascades Trail. It is by far one of the most scenic sections, and yet information about it remains elusive. You will find just as many folks who say they’ve ridden along the entire lake, as folks who will say it’s impassable.

Officially, there is a detour that passes the lake entirely due to a landowner who doesn’t want trail users crossing his property (The land in question is a one mile section along the lake. It’s a long story, but essentially, when the railroad went bankrupt, it gave landowners along the tracks the chance to purchase land back, and this is one of those cases). This is a shame, because as stated above, Rock Lake is a spectacular place to see, and because of the detour, it makes getting to the lake a difficult task.

First thing’s first; Rock Lake is remote. There are no major towns or highways near it. The community of Ewan (not like Ewan McGregor, It’s pronounced E-Won) sits at the south western side of the lake, and it consists of a handful of homes, a church, and a grain elevator. Out near the north eastern end is Pine City, which seems to be only slightly larger than Ewan.

The stunning views of Rock Lake do not disappoint.
Photo by Justin Scheib

Rock Lake is an unbelievably deep and difficult to access body of water. Like many other landmarks in Eastern Washington, it was carved out in the Ice Age Floods, leaving behind a massive chasm that is now filled with water (at nine miles long, and a mile wide in most places, it’s the largest natural lake in Eastern Washington). The lake is filled on its northern shore by the Pine Creek and Rock Creek confluence, and it flows out the south western side with Rock Creek. Those also happen to be two of the few places where the lake is accessible. There is a primitive boat launch near Ewan, but it can be dangerous for those less experienced with getting a boat into the water.

The vast majority of Rock Lake is lined with sheer basalt cliffs, many of which are undercut making it nearly impossible to get out of the water once you go in. Its waters can be near four hundred feet deep, and prevailing winds can whip up three foot white caps in a matter of minutes. Due to its depth, the water is cold and dark, hiding basalt spires just below the surface.

There are a lot of legends and folklore associated with Rock Lake, ranging from monsters that lurk in the deep, to ancient curses, ghost trains, and hauntings from the hotel that once stood on the southern bank. Some of these legends have been told more recently, and others date back to the Native Peoples who lived nearby.

All of this adds up to a place that is seldom visited in contrast to the beauty that this lake provides, and so for now, due to the detour, Rock Lake is only accessible as an eight mile out and back from the north eastern bank.

A satellite view of Rock Lake showing the paths of the two creeks that feed the lake from its northern bank.

Just south of Pine City, off Pine City-Malden Road, is Stephen Road, which is a well maintained narrow gravel road. It will lead you to Hole-In-The-Ground Road which takes you across Pine Creek where you will find a small gravel lot to park. Roughly 800 feet from the parking area you will find the Palouse To Cascades Trail.

To the right, the trail will take you through Pine City, Malden, and on into Rosalia. To the left, the trail will take you to Rock Lake.

The gate that crosses the trail on the way into Rock Lake.

The trail surface is loose and dry but the gravel is in decent shape, making this stretch completely manageable on a 40mm tire, anything larger is just for extra comfort.

The trail follows Pine Creek through an oasis of pine trees and rock cuts, which is interesting given that just a mile south, the rolling wheat fields of the Palouse stretch as far as you can see. In fact, this stretch of trail is the only real shade you’ll find for miles in any direction.

Surrounded by pines.
Looking down into Pine Creek.

About a half mile in, you’ll come to the first trestle. It provides a really nice view down into Pine Creek, and if you’re lucky, you may catch a beaver or two doing beaver things down below. There are two derailed boxcars at the other end of the trestle. The cars came from an east bound train that derailed in February of 1980, and it was one of the last trains to ever run on these tracks before they were abandoned by the railroad.

All of the undercarriage has been removed from the cars, leaving behind the empty steel shells.
Looking down into Pine Creek.

Beyond the trestle, the trail will move through a few rock cuts as Pine Creek moves in and out of view. There are a few spots where water seeps down from the basalt walls on the left, creating lush areas of ferns, wildflowers, and fir trees.

Several gates alongside the trail will remind you that all of the land surrounding the trail is private. I can’t stress enough how important it is to respect the boundaries of the trail and to leave no trace. The tensions surrounding the trail and the landowners are plenty, and the last thing needed is for people to further upset the folks who own land in this stretch.

There are two tunnels on Rock Lake, and they happen to be the only tunnels on the trail east of the Columbia River. The railroad numbered the tunnels starting in the east with the Snoqualmie Tunnel at Hyak being Tunnel number 50.

Just over two miles in, you will approach the eastern portal of tunnel 43. This tunnel is 756 feet long and has a very slight curve to the right. Overall, the interior is in pretty good condition with some small chunks of rock here and there.

Much like the other tunnels along the line, the western portal of the tunnel is finished with concrete, with the number 43 engraved into the cement to the right of the upper arch.

The eastern entrance to tunnel 43.
The western portal of tunnel 43.

Shortly beyond the tunnel you will have glimpses of Hole In The Ground, which is an area of lush green farmland at the bottom of the coulee that feeds into Rock Lake. It looks so out of place out here; a lush and green paradise surrounded by such otherwise harsh landscapes.

Hole In The Ground, where Pine Creek and Rock Creek meet.
The first small view of the water.

Before you know it, the trail moves right out to the edge of the cliff, exposing the immensity of the lake as it opens up before you. It’s a pretty spectacular sight to see, and just ahead, a trestle spans over two rocky basalt gaps in the cliffside.

This bridge is best described as unimproved, and while the spans beneath are steel, the decking will make your stomach drop if you are afraid of heights. The walkways consist of wooden planks laid lengthwise on the right side of the span with two cables that run the length as a makeshift railing. Some of the wood is split, and some smaller sections are just altogether missing. The left is just the original ties, complete with gaps that show you glimpses of the rocks below.

The cliffs along Rock lake, viewed from the trestle. Photo courtesy of Eli Bondarenko

Directly after the bridges, you will come to tunnel 44, which is in a much worse state than its predecessor. The eastern portal is overgrown and some large rock fall litters the entrance, while the western portal is a full-on slide across the trail.

For now, this is the end of the line and you have to turn around and head back the way you came. The trail is closed not far from the western end of the tunnel, and the last thing you want is a visit from an irate landowner.

A small section is rideable at the other end of the Lake from Ewan, however, you will quickly come to a trestle which is closed due to overgrowth and deterioration of the structure.

Important: If you plan on riding or hiking this stretch of the trail (or any section of the trail east of the Columbia, you’ll need a permit, which can be found here. It’s free, and it’s really more of a registration. You’ll get an email back with a list of rules and regulations regarding trail use and detours.

The good news regarding the future of Rock Lake is that it’s one of the top priorities of the trail for WA State Parks. The Palouse To Cascades Trail is part of the Great American Rail Trail and State Parks is doing everything they can ensure that the trail is eventually completed and safe to ride.

If you’re interested in reading about the trail on the westside of the Columbia, I have a full write up here.

Adventure By Bike.

Published by joeski

Look Fast. Ride Slow

9 thoughts on “Palouse To Cascades Trail: Rock Lake

  1. Dear Joeski! Thank you for your continued wisdom!!! I exchanged messages with you some time back about riding the P2CSPT all the way from Cedar Falls to Tekoa. An adventure I have been wanting to do for many many years.
    You were extremely helpful since i had not ridden a bicycle since high school growing up in Spokane, and now my trip is about to become a reality. We start our ride on August 16th with my cousin from California and a dear friend. 5 days 4 nights (West to East). It took me a couple of months to re-learn how to ride a bike and loving every moment of my training rides on the bike trails (e.g.., Snoqualmie Preston, Valley, etc.). I ended up purchasing a Salsa Vaya from a great bike shop in West Seattle (Alki Bike) and am enjoying it. I love the shop and my new friends there (i.e., Chris and others). I listened to your advice and am running 44mm tires right now (specs say 45 mm max) and thinking about putting a 47mm on the front since it looks like it will fit. Not sure about the back tire since the frame is a little tighter back there. I wanted your advice whether you think this would be a good setup. I think it would be since the front tire could be used as a shock absorber as I ride on some of the heavy stuff out there, but not sure if it would impact my riding speed on the pavement for the Detours in the Eastern Section. Looking back, I kind of wish I would have purchased a bike with more frame space for larger tires than the 45mm, but on the other hand, the 45mm may be enough for general gravel biking, which includes riding on pavement too. I also love the drop bars as opposed to my street bike with the straight bars.

    I was also wondering if you run tubes in your tires or riding tubeless. I’m a little concerned about the goat heads in the eastern section around Syrma and Warden. Do you also use “slime” in your tires? I’m trying to keep it simple, so thinking about sticking with tubes. My friends at Alki Bike say they have their own “slime” formula that I will talk to them more about as August gets closer. I got my first flat since High School (pinched flat from not enough air in my tire), and surprisingly found out that it was not that difficult to repair. I also learned that I need to check the air in my tires before each ride and not just pinch the tire to see if it has air in it!! I’m a long distance mountain trail runner and not used to having to deal with equipment such as a bike, which has been not only fun, but very educational.

    On an important note, your latest message is very important. We were thinking about riding the Rock Lake portion and bypassing the Detour since I have been reading a lot of write-ups of people hiking that portion of the Trail. You convinced us that this is not a good idea. The damaged trestle looks very dangerous. The out-and-back options are good alternatives.

    Thank you again for all of your advice!

    With my deepest gratitude,



    1. Hi Don, I think 44 will be okay. I’ve ridden through the deep stuff on the Eastside on a 45 and it was doable, I just had to pay attention to my front tire and where it was tracking. It’s really all about comfort and control. I say to just put the biggest tire you can on your bike and go with it. If you are concerned, you could source a set of 650b wheels for your Vaya, and then you can fit a 2.2″ tire in your frame.

      I do run a tubeless setup and I love it. However, I know all of the risks associated with the worst case scenario of a tubeless failure and can fix it on the trail. To me, the ability to run lower pressures and get fewer flats is worth it’s weight in gold. Tubeless isn’t for everyone. I have lots of clients who still choose to use tubed clinchers and there’s nothing wrong with that.


      1. Dear Joeski! As always, thank you so much for your great advice!!! Do you have plans to ride the entire eastern section soon? You have the best write-ups! Would love to see it. Any sage advice on dealing with the goat heads near Syrma and Warden? We plan to take the Coalition’s recommendation and bypass the Trail near Syrma and ride on the nearby road that parallels the Trail. Not sure about Warden.

        I can’t wait to start experimenting with different tire pressures. It sounds like running “tubeless” gives you a lot more flexibility in this regard. I gather no “pinched” punctures!!!

        Looking forward to reading more of your very interesting Posts. You inspire us!!!



  2. What an awesome, informative post. Thanks a lot. I’ve ridden from Seattle to the Beverly Trestle and back twice now. I’m really looking forward to the bridge opening for trail use so I can ride the eastern section. Rock Lock is now a must see destination for me.


  3. Perfect message Chrimbus. Joeski’s informational blog is the best! And, so “thoughtful and giving” with sharing information. Especially to those of us like me who are new to gravel biking. Helped me tremendously to ride the P2CSPT all the way to the Idaho border from Cedar Falls during the middle of September. Unfortunately, do to time constraints, we did not get a chance to ride the out-and-backs at Rock Lake. I hope to get back and ride that part. I also need to get back to ride the Beverly Bridge. It was suppose to be open by the time we were to go through there, but the sad and unfortunate accident that occurred delayed the opening. We also made it through the Boylston Tunnel that ended up not being too bad. My friend and I were careful to watch out for each others’ derailers to make sure the willow branches did not get caught up in them. The rock pile in the middle of the tunnel was not too bad either to climb over. Even though I have not ridden the detour, I believe it shortened our time significantly. Regarding the eastern section, the detours were challenging on many of the freshly thickly graveled roads. And, hilly. Our wheels would spin in place as we would ride up some of the hills. The wheat farmers in eastern Washington, bless their hearts, keep the roads in perfect shape to transport their harvest. I agree wholeheartedly with Joseski and took his advice and ran the largest tire I could run on my bike (a 50mm on my Salsa Vaya and did not have to change my wheel size). And, my good friend Chris at Alki Bike put a nice handle bar and seat suspension system on my bike that made all the difference. I also learned that having good upper body strength made a huge difference for me as well. Especially, for the sections from the Yakima Training Center to the Idaho Border. Happy Riding!!! I love the sharing of information so we can ALL enjoy the adventures!!!


  4. This is a beautiful write-up! I’m planning a cross-state trip on the PCT, taking the necessart detours as required. But now I will include a side trip to Rock Lake as an OAB highlight, following your recommendations and being respectful of this landscape and, of course, of all property rights.


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