Trail is suitable for all skill levels.
Only restrictions that were posted were restricted hours during hunting season.
A 25-minute drive from downtown Charleston, the trailhead has ample parking and two Porto-Johns. No running water that I saw.
The Red Loop is the main trail and is approximately 13 miles long. It is very well-marked with large red blazes on trees all along the way. There are several small loops that leave and return to the main trail that are marked in yellow. Around the 10-mile mark, there is a ~three-mile add on for the Foster Creek Loop marked in orange.
The turns are smooth and there practically no challenges on this trail save for a few rooty sections.
The trail is open year round, and is usually in very good shape with no ruts or erosion.
Marrington is a great way to see the low country; a beautiful area and I saw very few people on the trail.