In this area you will be able to hike about 3/4 of a mile to the site of the first nuclear reactor which is buried deep within the ground. There is one placard at the entrance to the narrow dirt path (located at the southwest end of the Red Gate Woods parking lot) that leads to the paved trail that leads to the site. Look for that entrance at lower end of the parking lot. I've posted photos of that placard, also of the placard with the map of the trails, of the placards at the site and of the trail, taken after dark. UPDATE: I don't see my pictures with this review, however, they are in the "Photos" section, toward the bottom third of photos. On full moon nights, please beware of the wolfman. Do not eat any berries or mushrooms you may see anywhere on or off the trails, and PLEASE be careful not to touch any plants or trees as there may be Poison Ivy and Poison Oak growing along the narrow dirt path. Have a good time. BICYCLISTS YIELD TO HIKERS!

This is such a cool park!!! There’s trails both paved and unpaved. Neat area to explore with parking lot to leave your car. There’s some pretty gnarly mountain bike trails if that’s your thing. I love this park so much.

Excellent choice for bicycle, or hiking, absolutely beautiful nature around, the trails are very well done and there are maps everywhere, around every corner. Would go again with my bicycle next time.

Great place for picnicking. Great history of this location at the dawn of the atomic age. Access to main orange trail up to the moraine trail.

Nice place to hike around, not so nice for finding interesting plants. Did not dig up the spent housing of the nuclear reactors, but might come back. I saw a large and suspicious chunk of metal slag laying on the ground near the reactor site which I made sure to kick, and I am happy to report there are no burns on my foot.

This is a great mountain bike trail network. Please beware, some of the inner loops are HARDCORE mountain biking trails! If you’re not in decent shape or don’t have an actual mountain bike that can withstand the pounding, do not attempt! It is a pretty big network and it’s easy to get lost. Use your phone’s GPS or an app like Trailforks.

Truely amazing super fun challenging mountain biking trails.

Very interesting historic site where the world's FIRST atomic reactor is now buried! A new, inscribed marker there is accessible from an easy hiking trail of approximately two miles total from the parking lot and back. Family friendly and educational. Recommended!

July 16, 2022: Lemont Nuclear Reactor: The proximity of 3 of 6 Illinois reactors are near Chicago with melt down potential that can make Lake Michigan and our river supply unsafe, like the DesPlaines River.

Great bike path, great walking path; nice shade trees on a hot day; found the burial site for nuclear reactor!

Great mountain biking trails. Not for the faint of heart! You WILL have to work hard, but the immersion in nature is well worth it. Alternatively, you could take a whole day hike and get the same (maybe better) immersion. I wish it was closer so I could come here more frequently. I'm going to check out the area for hotels for multi day experiences. Just get yourself and your friends there. You can thank me later.

Had a great time on a Thursday evening it was moderately busy, I wend on the orange and black diamond trail. I'm still a novice, but the route was doable though I was slower than many of the advanced riders with superior bikes. Had a little trouble finding my way from the orange route back to the parking lot due to an unmarked route that connects the two. Will definitely go back.

Cold windy muddy day for a nature walk but nonetheless a lovely time. Fascinating history behind the area. It's just great to be outside again!

Nice trails for hiking

Fun place to go if you want to go mountain biking or hiking.

Very nice picnic area, plenty of parking and several awesome trails for both hiking and biking. The trails were not marked very well so do some research in advance, as we were confused and had to use the All Trails app to navigate our way

Not a good place to take a nature walk. Trails are thin and often muddy as sunlight doesn't reach the trails in the thick of the forest. Many preservers a short distance away - along Wolf Road and 95th Street are much better.

Beautiful place with lots of hiking and biking trails.

Great place to get on the MTB trails or take a hike. Less crowded compared to other lots at Palos.

Looks like trash!!! Poor fauna and flora! Now we need to wait little bit when oaks will start die! Heavy vehicles are not good for oaks roots! Who is responsible for this decision??? It’s our money from our taxes!!! Now this environment looks like trash!!! Who can enjoy looking at this disaster?

I love the diversity of options here. The mountain biking is probably easy for the young guys with their big tires, but manageable for us older folks with hybrids, energy & patience. There is a variety of trails so it's important to look at the difficulty before starting out (which we did not do). But love going back & trying new trails or trying to conquer the ones that are tough.

Top notch trails, predominantly mountain bike, but can definitely hike or run also. Very courteous people. Very clean trails