Foot and bicycle traffic only.
From the parking lot take the paved trail for about 1 mile and the singletrack will be heading into the woods on your left.
The trail is a lollipop type layout so you'll have about another mile on some light technical trail as it follows a narrow strip of land sandwiched between I-40 and Lake Dardanelle. There will be a couple of grunt climbs before you get to the beginning of the loop. Word of caution, you'll come to a bridge that is at a angle going down a ravine. If the bridge is wet you should probably walk around the bride as it can be very slippery when wet.
Once at the loop you can head to the left or to the right. I think it flows better going to the left and doing the loop in a clockwise direction, the whoopie doos toward the end seem to be much better this way. The trail will have you weaving through the woods on some rolling to flat terrain, you won't find any big hard sustained climbs out there. As you get on the other side of the loop you'll start to hit a few grunt climbs and some really fun whoopie doos. Once you have finished the whoopie doos you'll have a couple of short little climbs back to the beginning of the loop.
Overall the trail is really not that hard for someone who has been mountain biking for a bit. The biggest thing out there would be the number of roots and a few little technical sections and the occasional steep grunt climb.