Shields Lake is a shallow lake of 30 acres with at 87% of its area in the littoral zone where rooted plants can grow. It's used mainly for fishing and has a public fishing pier. It drains 538 acres with most of that lying to the south of the lake. Shields Lake drains to Forest Lake. The lake was placed on the State's Impaired Waters List in 2006 due to high nutrient levels. It currently has a lake grade of D-, with monitoring in 2015 showing worsening water clarity. Shields Lake has been the focus of a number of past lake improvement efforts including aeration, fish stocking, fish barrier installation, chemical rehabilitation, and alum treatment. The lake's current management includes an aeration system and a fish barrier on the outflow stream to Forest Lake. In 2007, trumpeter swans were noted to be nesting on the lake.
Public Notice: The CLFWLD is running an aeration system on Moody Lake and Shields Lake beginning on or after January 1, 2021. This will result in thin ice and/or open water on the west side of Moody Lake and wast of the public fishing pier on Shields Lake. The aerators will remain on until ice-out in spring 2021. Please execise EXTREME CAUTION on Moody and Shields Lakes until ice-out. Read the full notice here.