Twin Lakes is located toward the northern part of the chain, between Quince and Primrose Roads, and just north of Interstate-80. The lake is surrounded by private property, including woodland and Westwood Hills.
There are two distinct areas of wetland totaling 40 acres, but some refer to this location as a single lake because the area to the west is very shrubby and appears to have little or no standing water. In recent years, the area to the east also appears to have less standing water but still consists of submergent marsh and shrub marsh, and has a small wooded island. This area of wetland has some more common plants found in the corridor like pickerelweed (Pontederia cordata), buttonbush (Cephalanthus occidentalis), and water smartweed (Persicaria coccinea). However, there are also surprises, including the carnivorous common bladderwort (Utricularia vulgaris). Overall, more than a hundred native plant species have been documented here thus far, two of which are state threatened or endangered. Sandhill cranes (Antigone canadensis) also call Twin Lakes home.
There is currently no public access. Despite what is known, a more comprehensive ecological survey is needed to fully document plants and animals present and to understand the environment of this lake.