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Weather 49 minutes ago · New Lisbon Mauston Airport
Castle Rock Lake is managed by Wisconsin River Power / Wisconsin DNR.
We do not have a usable elevation versus the published reference for this lake right now.
We don't have enough recent gauge readings to summarize Castle Rock Lake's status yet. View the water level page for the latest published data.
Juneau County, WI · U.S. Drought Monitor county statistics at the lake location (not a lake-specific designation)
No Drought
No USDM drought categories are reported for Juneau County, WI. These figures describe the surrounding county from the lake location, not the lake itself.
Severity
Weekly trend
Stable
Compared with last week
Official drought (D1–D4)
No
Abnormally Dry (D0) is present in the surrounding county, but D0 is not counted as official drought (D1–D4).
U.S. Drought Monitor · map date Oct 20, 2026. Updated weekly. Official drought means U.S. Drought Monitor categories D1–D4 (Moderate through Exceptional). Abnormally Dry (D0) is not counted as official drought. droughtmonitor.unl.eduView drought map for Juneau County, WI
Managing authority
Waterbody / project type
General factors for reservoirs like this
These are common influences for this type of lake. They do not identify the cause of a specific current change unless an operator update confirms it.
Rainfall & inflows
Rain and upstream river inflows can raise reservoir levels, especially after storms.
Downstream releases
When an operator releases water through a dam, reservoir storage can fall and downstream flows can rise.
Managing authority: Wisconsin River Power / Wisconsin DNR
Observation source used by Lake Insights: Not published
Who manages the lake and who publishes the reading Lake Insights displays can differ. Lake Insights does not invent a source label from the managing authority alone.
Shared background — not lake-specific facts
Lake Insights aggregates water level information from authoritative public sources such as the U.S. Army Corps of Engineers, NOAA, TVA, Bureau of Reclamation, power utilities, and other official lake operators. We preserve historical observations, calculate trends, and present lake conditions in a consistent format. Lake Insights does not predict future lake levels unless an official forecast has been published by the managing authority.
Flood-risk operations
Some projects store or release water under flood-risk rules when conditions require it.
Water supply
Some reservoirs support municipal, industrial, irrigation, or regional water-supply needs.
Hydropower
Hydropower projects may pass water through turbines when generating electricity.
Seasonal weather
Dry periods, heat, evaporation, and seasonal rainfall patterns can affect storage over weeks and months.