Lost Valley

Lost Valley

The name comes from the bootleggers who once made use of the area, getting lost among the numerous hollows. It was also near the site of an ammunition works and uranium processing plant which necessitated the cleanup that lies under the large mound on Hwy. 94. Now, the trail is a 10.5 mile loop with a mixture of double and singletrack punctuated with old homesteads, rock formations, natural springs, and a waterfall crossing. This is a very scenic and enjoyable mountain bike experience.

The gravel/doubletrack sections are fairly flat. The singletrack sections are super-flowy with punchy rock obstacles that will reward you with great views and better riding, the trail can get technical in spots and is now a much longer ride due to the increased singletrack. Be advised that this 10.5 mi loop will take some riders 2 hours to navigate due to the amount of singletrack and the difficulty of the rocky sections.  There is a central fire road that cuts the loop almost in half which can be used to shorten or lengthen your ride.

Trail surface varies from dirt to rock throughout the trail, and drains very well, except in the flats of the lower creek bottom.

The trail is open until 10 pm, so it's a good place to ride at night.

Directions

From the Highway 40/94 interchange: Take Highway 94 South approximately 5 miles. The trailhead parking lot will be on your right hand side. It is not very well identified as "Lost Valley". A good landmark is the shooting range at the top of a hill on the right hand side of Hwy 94. When you descend that hill the parking lot will be on your right hand side, at the very bottom. It can also be accessed by going 7.2 miles east on the Katy Trail from Klondike Park.

Trail Information

Rating

Intermediate

Length

10.5 miles

Type

Loop

Weather

Trail Conditions

Latest Conditions

From pilznr on Tue, 10/09/2018 - 2:30pm - Lost Valley (St. Charles Area)
All good.
From honcho on Fri, 10/05/2018 - 9:07am - Lost Valley (St. Charles Area)
Trail is in good shape however there is a large tree down over the middle climb. There is another tree down on the double track climb after the drop in that can be ridden under but it's precarious
From Plumberboy on Thu, 09/20/2018 - 9:42pm - Lost Valley (St. Charles Area)
Trail is great and fast. There are a few trees down in random areas. To big to move or I would have. All are fun to to go over but just be aware!
From RichLee0717 on Thu, 09/13/2018 - 12:39pm - Lost Valley (St. Charles Area)
It's in great shape, however there is a very large tree down across the middle gravel climb about half way up the climb.
From sai on Mon, 09/10/2018 - 5:30am - Lost Valley (St. Charles Area)
Great shape. There are about 4 puddles, but that's the anomaly - all is tacky/perfect.
From RichLee0717 on Sun, 08/26/2018 - 4:16pm - Lost Valley (St. Charles Area)
This morning the trail was great, just a few wet low spots you can avoid. New tree down on single track just before the fire road going ccw on the west side. You cannot go through it, had to go down the hillside.