You want to jump in but watch out for leeches - Review of Bear Lake, Rocky Mountain National Park, CO - Tripadvisor.
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Bear Lake contains abundant suspended microscopic particles of white-colored calcium carbonate (lime) that reflect the water's natural blue color back to the surface, giving the lake its intense turquoise-blue color.
It was formed by fault subsidence that continues today, slowly deepening the lake along the eastern side. In 1911 the majority of the flow of the Bear River was diverted into Bear Lake via Mud Lake and a canal from Stewart Dam, ending 11,000 years of separation between the lake and that river system.
Bear Lake contains abundant suspended microscopic particles of white-colored calcium carbonate (lime) that reflect the water's natural blue color back to the surface, giving the lake its intense turquoise-blue color.
We went on a Monday and had the 10 am access. The shuttle lot was crowded but it ran efficiently. To be clear Bear Lake itself is nice but would not be worth if it was all you did. The other parts make it look like any of a million alpine lakes.
Bear Lake is beautiful -- but resist the urge to jump in, or else you may come face to face with an alligator! Swimming is prohibited here for this reason, so keep your pupper well away from the shores at all times.
Blue-Green Algae is in fact not an algae at all, it is a bacteria (cyanobacteria). This type of bacteria is found in many lakes, ponds, and reservoirs across the world. They are usually present in low numbers, but can become very abundant in warm, shallow, undisturbed surface water that receives a lot of sunlight.
Bear Lake is stratified in summer-spring where lighter water overlies denser water. During the winter months the mixing processes of winds and surface cooling break down the layers and the lake freezes over. Bear Lake does not completely freeze over every year but typically three out of five years.