Ashegon Lake

Ashegon Lake earns an A — every scored parameter (clarity, phosphorus, and chlorophyll-a) rates among the best monitored waters in Sawyer County. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

Mesotrophic conditions dominate at Ashegon Lake: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. The lake's 56 ft maximum depth is in the upper tier for Wisconsin — deep enough for cold-water fish to find refuge in summer. Ashegon Lake is small — 75 acres alongside partial shoreline records — which makes it sensitive to even modest changes in watershed runoff or recreational pressure. Among the 50 graded lakes in Sawyer County, Ashegon Lake ranks 11 — in the top quartile locally.

An invasive species record — Chinese Mystery Snail — has been logged at Ashegon Lake; Wisconsin DNR maintains the official infested-waters list. The fishery includes walleye among the lake's 6 documented species — a notable draw for Wisconsin anglers. The grade is supported by multiple sampling years from the Wisconsin DNR Citizen Lake Monitoring Network, giving the letter a reasonably stable foundation.