The Inkwells (also known as The Ink Wells) are 2 deep natural swimming pools in

Lagunitas Creek Lagunitas Creek is a -longU.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map, accessed December 27, 2017 northward-flowing stream in Marin County, California. It is critically important to the large ...

, in

Marin County, California Marin County is a County (United States), county located in the northwestern part of the San Francisco Bay Area of the U.S. state of California. As of the 2020 United States Census, 2020 census, the population was 262,231. Its county seat and ...

. The upper Inkwell is also known as "Shafters", named after the former railroad bridge that bore its name nearby, whereas the lower Inkwell is simply known as "Inkwell" or "Hole" because it is deeper and darker. Together, they are known as "The Inkwells". They are a common swimming spot in summer, despite failing to meet current water quality standards due to high levels of

coliform Coliform bacteria are defined as either motile or non-motile Gram-negative non- spore forming Bacilli that possess β-galactosidase to produce acids and gases under their optimal growth temperature of 35-37°C. They can be aerobes or facultative ...

. The Inkwells are accessible by car as well as public transit, with a

Marin Transit Marin Transit is a public bus agency in Marin County, California, in the United States. Originally formed in 1964 as Marin County Transit District (MCTD), Marin Transit was re-branded on 30 July 2007 and now provides a variety of fixed-route and de ...

bus stop being less than a mile away. The Inkwells Bridge, which runs above the inkwells, is part of the

Bay Area Ridge Trail The Bay Area Ridge Trail (Ridge Trail) is a planned multi-use trail along the hill and mountain ridgelines ringing the San Francisco Bay Area, in Northern California. Currently, have been established. When complete, the trail will connect ov ...

. It also carries pipes that bring water from nearby

Kent Lake Kent Lake is a reservoir in western Marin County, California formed by the construction of Peters Dam across Lagunitas Creek. Built in 1954, the lake is the most recent lake of the Marin Municipal Water District, as well as the largest. It lies ...

and the nearby

Nicasio Reservoir Nicasio Reservoir is a shallow, artificial reservoir in the Nicasio Valley region of Marin County, California, United States. It covers and sits in a drainage basin. It was created by the construction of Seeger Dam on the Nicasio Creek in 196 ...

to be treated.

References

{{DEFAULTSORT:Inkwells, The Natural pools Geography of Marin County, California