Blue Hole

• Location: Trent-Severn Waterway
• Mile Marker: 21.7
• Lat / Lon: N 44° 14.912' / W 077° 43.315'
• Depth: 12 feet
• Description:

  Depart the channel and leave green T139 and its day mark well to starboard. There is 20 feet or more of water as you enter, but it quickly drops to 8 feet or less. There is room for one or two boats. Do not try to enter the 11-foot finger of water to the east. It is grassy marsh.