Explore the most popular Forest trails in Weldon Spring Conservation Area with hand-curated trail maps and driving directions as well as detailed reviews and photos from hikers, campers and nature lovers like you.

My dad and I went when I was in town and really enjoyed it!

I clocked 12.6 miles from my car right at the trailhead and back. Didn’t get off track either. I don’t know if I’d say this Trail is amazing, but maybe it’s better with more greenery. Saw maybe 8 bicyclists and 1 other hiker. The trail was nice and all but didn’t have any real scenery and I imagine the scenery we did have will be covered once the leaves grow in. The airport nearby had many planes coming and going, and very audibly. The police shooting ranges that back up against the park sounded like we were in a war zone. That paired with the smoke from an apparent nearby prescribed burn just added to the special effects.

4 days ago

Lots of mud today and trees down. Creek is beautiful!

Best trail in the area as far as distance, terrain and scenery. I just ran it today after a lot of rain and when every other trail was too muddy to run, Lost Valley was perfect!

my all time favorite trail near st Charles. bring water!!

One of my favorite trails for variety and views, but the trail is beat up really bad. Not sure if there are plans to repair it. Be careful of slippery mud sections during thaw or severely uneven path when frozen.

great hike. beautiful sights of the river. it starts as lewis &clark but the the two trails split mid way. the app says its 4.7 miles but the trail head said 5.3.

great hike. beautiful sights of the river. it starts as lewis &clark but the the two trails split mid way. the app says its 4.7 miles but the trail head said 5.3.

Amazing trail to go on.

This is a beautiful trail! Well kept but not very well marked in some places. However, the trail is fairly easy to follow.

This is my go-to workout trail.

One of my favorites. Great all year round!

Great day for a hike. Views of the Missouri River were great. Our tracker has it closer to 8.6 miles. Did the loop in 3 1/2 hours

One of my favorite trails to hike!

Ran this trail, challenging hills, decent straight aways, definitely do it again

One of my favorite trails to hike! The bluff overlooks are beautiful and there's two options based on what length of hike you want. It does get busy on the weekends in the spring/summer.

3 months ago

I just hiked this trail in the last week of November and it was very pleasant. It was midweek and I still came across several hikers and about 10 mountain bikers during the day.

This is the third time this year that I have hiked the entire Lost Valley Trail. I feel that hiking it clockwise is the easiest as most of the two-track road sections are then downhill and mostly on the 2nd half of the hike.

Also, the Carbonite mileage markers are all laid out for viewing in this direction. There are markers every half mile and the trail is easy to follow even while covered with leaves.

When starting out, I also prefer to follow the Little Femme Osage Creek which is the "old way" of hiking this loop. When you reach the first Carbonite sign with 2 arrows pointing right for "Lost Valley Trail" and "Short Loop," you instead bear off on the unmarked road to your left.

This keeps you along the creek and you'll meet back up with the marked trail around the 1.5 (?) mile marker. This is also the route shown in the book, "St. Louis: 60 Hikes Within 60 Miles."

very fun trail! family just went from trailhead to river lookout and back but look forward to doing whole loop without little kids!

This is an excellent trail, well maintained, and with breathtaking vistas of the Missouri River basin sprinkled along the backside of the route. The trail features shorter five mile loop as well as the longer seven to eight mentioned here. Seriously one of my favorite day hikes - I stop here at least a few times a year.

Also good for trail running in my experience.

Be very careful during wet seasons. I hiked this trail this weekend and ended up slipping on a muddy hill and breaking my ankle. The EMTs said that they have to pull someone off the trail once or twice a month. Very beautiful trail other than that.

A great hike with pretty views! It was pretty muddy though!

My favorite trail near me.

beautiful fall variations of color during this time of year.

Nice view of the Missouri river with some good elevation change. Wide, even path and well-trafficked.

I've hiked and ran both the Lewis & Clark. It is by far the best trail around! As others have discussed, depending on the time of year it can be muddy and mosquitos can carry you away. The trails can get a little busy on the weekend but it isn't normally very bad. Parking can be an issue.

The Clark can be hiked in around 2-2.5 hours.

The signage was way to inaccurate. The sign said we were .1 miles away, but it was closer to to 2 miles. I would not hike here again.

Hiked on 10/16/2018, and there were no mosquitos (yeah!!). I have hiked the Clark Trail, and the longer Lewis version. Trees are starting to turn. By 11/1, this will be an incredible hike with beautiful bluff views.

For a special treat, hike about 1 mile to the first bluff for the sunset. Easy hike back with a head lamp.

I did the Lewis Trail on a warm Tuesday in early October. The bluffs, ridges, and valleys were enjoyable. Although there are more bluff views on the overlapping Clark Trail portion, there is one bluffview on the Lewis Trail that surpasses all the bluffviews on the Clark section.

Athough I encountered 20+ hikers on the Clark Trail section, I didn't encounter a single person on the Lewis section of the trails.

A word about mosquitoes: although they were bearable on the Clark Trail they were quite thick on the Lewis Trail. I believe the reason is that on the Lewis Trail there are many more creek bed crossings that can hold some standing water. I hope to return after mosquito season is over. It was a nice hike.

My Alltrails/GPS indicated a hiked distance of 10.4 miles and a traveling time of 3:34.

great as always! lotta vegetation creeping up on the paths + fallen trees. also be on guard for bikers hauling butt thru some very thin trails at some points. No ticks at this time but plenty of pesky gnats + flies.

Gorgeous and shaded trail with a spectacular view of river. Pretty easy overall except few hill where you will break a sweat.

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