Water Depth
Depth is not verified by iCliffDive. Inspect from the water and never assume a reported swimming hole is deep enough for jumping.

Byron, Maine, United States
VERIFY WATER CONDITIONS, ACCESS, DEPTH, AND EXITS BEFORE ENTERING*
Coos Canyon is a reported cliff / freshwater jump spot in Byron, Maine, United States. Jump height, landing depth, and access conditions must be checked on site before anyone treats the water as usable.
Sources point to current-dependent depth, polished rock, crowding, and the need to check every landing zone and exit instead of following other visitors blindly. Treat this page as a planning guide and verify current conditions before visiting.
Overview
Coos Canyon is described as a well-known Maine swimming canyon where smooth river-carved rock, green pools, and ledgy entries attract strong summer traffic.
Quick Answer
Coos Canyon is a reported cliff / freshwater jump spot in Byron, Maine, United States. Jump height, landing depth, and access conditions must be checked on site before anyone treats the water as usable.
Key Takeaway
Sources point to current-dependent depth, polished rock, crowding, and the need to check every landing zone and exit instead of following other visitors blindly. Treat this page as a planning guide and verify current conditions before visiting.
Quick Answer
Coos Canyon is a reported cliff / freshwater jump spot in Byron, Maine, United States. Jump height, landing depth, and access conditions must be checked on site before anyone treats the water as usable.
Key Takeaway
Sources point to current-dependent depth, polished rock, crowding, and the need to check every landing zone and exit instead of following other visitors blindly. Treat this page as a planning guide and verify current conditions before visiting.
Conditions and planning notes
Depth is not verified by iCliffDive. Inspect from the water and never assume a reported swimming hole is deep enough for jumping.
Use Coos Canyon only after checking roadside parking, river flow, slippery rock, and whether the canyon pools can be inspected safely from the water.
Approach details come from public source notes and should be checked against current trail conditions, closures, parking rules, and weather.
Primary hazards include variable depth, current or river flow, slippery rock, submerged objects, crowding, limited exits, and posted restrictions.
Rock takeoffs can be slick, uneven, crowded, or restricted. Use only legal, stable, inspected takeoffs with a confirmed landing and exit.
Sources point to current-dependent depth, polished rock, crowding, and the need to check every landing zone and exit instead of following other visitors blindly.

Map location
Use the source location details as a starting point until exact coordinates are added.
Coos Canyon sits in Byron, Maine, United States and is described as a rock-walled Swift River canyon with green pools, smooth slides, and cliff-style river entries. The saved sources provide enough location and usage context for a planning page, but the public copy should stay careful about what is known versus what still needs local verification. Conditions can change quickly at natural-water spots. Rain, flood release, snowmelt, algae, crowding, debris, watercraft, and changing exits can make an older photo or video a poor guide for today's conditions. Before planning a jump, verify legal access, parking, current water level, landing depth, submerged hazards, footing, takeoff options, and a clean exit from the water. Walk away if depth, flow, visibility, rules, or exits cannot be checked directly.
FAQs
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