Great trails! There's a choice of short, moderate (white) or long (blue). I did moderate with my dog the other day and it was 6.7 miles according to my GPS tracking. Nicely maintained trails and easy to maneuver even after heavy rain. CAREFUL: A medium sized dog came charging from the woods from one of the bordering houses at about the 3 mile marker near the halfway point.
It was a relatively flat trail with only a couple of very slight elevations. Also, there was only a few trip hazard areas with large tree roots sticking out of the ground. It was pretty secluded with a lot of shade. It was perfect for trail running. However the boardwalk about a mile in is now closed for repairs.
Shaded for the most part but a few sunny patches. Some inclines and not too many stumps or rocks. An easy walk or a moderate trail run. Fairly secluded although there is a section where the trail runs behind people's homes. $2 per person entrance fee.
Heads-up - the trail is now closed in the middle due to damage to the boardwalk. You can still get about a mile starting from Sandy Creek Nature Center, or something over 2 miles if you start from Sandy Creek Park.
Trail is easy with very little elevation change other than the mile or so closest to Sandy Creek Park. In season, the mosquitos are nightmarish, even with repellent. Still, it's a lovely trail.
I am a novice in hiking, so unsure how to rate the trail. We went on a Thursday after school was in session and only encountered 3 other hikers. The trail was steeper than we expected (in places) but still not difficult. Bathrooms were well maintained. Trails also very nice and paths clear. A few more signs along the trail might be nice. We had our dog with us, but bank was steep so her access was limited. Bring water! We did and used it often--not for us, but for the dog! My husband and myself are in our late 60's. Park was free for our age.