Indigo Neck is a primitive hiker-biker campsite located at mile 139. 2 of the C&O Canal towpath near Little Orleans, Maryland, offering free first-come, first-served camping with a one-night limit.

The site features a chemical toilet, picnic table, and grill, with non-potable well water available seasonally (mid-April to mid-November) that must be filtered or treated before use.

Access is via the towpath only with no vehicle access, making it ideal for through-hikers and cyclists exploring the 184. 5-mile canal corridor.