Best for intermediate divers, Up to 119m, shore & boat entry, mild current.
East Portal is a freshwater site located within the Denver Metro Reservoirs, notable for the underwater entrance to the Alva B. Adams Tunnel. The topography consists of a rocky shoreline suitable for both shore and boat entries. Divers should be prepared for cold water conditions year-round, with summer surface temperatures between 10 and 18 degrees Celsius and deeper sections dropping to 4 to 9 degrees Celsius. Thermoclines are common at this high-elevation location. Visibility is variable, typically ranging from 4 metres upwards. Due to the cold water and potential for low visibility, this site is best suited for intermediate divers. Snorkelling is also a popular activity along the rocky perimeter.
40.24120, -105.80240
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Depth
Up to 119m
Visibility
4m+
Skill Level
Intermediate
Entry
Shore & Boat
Current
Mild
There is no data available regarding marine life at this site.
This site is recommended for intermediate divers due to the cold water temperatures and variable visibility.
Depths at this site reach up to 119 metres.
Both shore and boat entries are possible at this location.
Yes, snorkelling is permitted and rated 4 out of 5 for this site, particularly along the rocky shoreline.
Divers should be aware of the cold water temperatures and the potential for low visibility.
Diving at East Portal in Lakes requires the following certifications: Open Water. Always dive within your training limits.
East Portal in Lakes typically has mild currents that most divers can handle comfortably.
Visibility at East Portal in Lakes is typically 4 metres or better. Conditions vary with weather, tides, and seasons.
