LakeList
FavoritesStateWisconsin
Castle Rock Lake
Enhanced dataInteractive depth contours
Castle Rock LakeJuneau County, WI
Contours load with map Access
Interactive depth contours5-foot typical interval · Sonar-derived depth (C-MAP Genesis) · Gaps interpolated · Not for navigation
Source: C-MAP Genesis community sonar (derived)high confidence · QA passed · Select a contour to inspect its mapped depthDepths decoded from C-MAP Genesis Social Map community sonar recordings (used with permission), covering 30% of the lake. Small gaps between recordings are smoothly connected; larger unrecorded areas follow the lake's depth model calibrated to the DNR-documented 35-ft maximum depth. More accurate than a pure model, but still an estimate. Not for navigation.LakeList assistant
Plan your lake day
Fishing spots, food, lodging, marinas, and rentals around Castle Rock Lake.
Start here
Fishing
Fishing at Castle Rock Lake
Fishery
Notable species
PanfishWalleyeCatfishLargemouth BassMuskyNorthern PikeSmallmouth BassSturgeon
Angler reports · Fishbrain
What anglers catch here
Anglers have logged 590 catches on Castle Rock Lake via Fishbrain — 24 in the last 30 days, most recently on Jul 25, 2026.
Most-reported species
- Smallmouth bass
- Walleye
- Northern pike
- Freshwater drum
- Channel catfish
- White bass
Show 10 more species
- Muskellunge
- Largemouth bass
- Common carp
- Yellow perch
- Flathead catfish
- Lake sturgeon
- Black crappie
- Bluegill
- Rock bass
- Bigmouth buffalo
49 of the 590 logged catches didn’t name a species and aren’t listed above.
Seasonality
All fishOf the 590 logged catches, 509 carry a month and 497 carry a year; the charts cover those.
2024 had the most reports (106).
Counts reflect reporting activity, not fish populations. Waterbody location is provider-level; exact spots and angler details aren’t shown.
Fishery details for this lakeExplore this area on FishbrainNWS weather
Weather windows
Weather-based planning from the National Weather Service hourly forecast near this lake — not a catch forecast.
Loading latest forecast…
Checking wind, precipitation, and near-term weather windows.
Water temperature
Castle Rock Lake water temperature today
Modeled surface-temperature estimate built from seasonal climate, lake depth, and live National Weather Service air temperatures near this lake.
71°FWarm
Seasonal estimate. Checking current National Weather Service air temperatures…
Comfortable summer pattern. Bass and panfish are active; early and late hours beat the midday heat.
Estimates are modeled, not measured. Actual temperatures vary with depth, wind mixing, and recent weather — verify conditions before swimming, boating, or heading onto ice.
DNR water check
Water quality quick take
Historical volunteer-monitoring record for this lake.
Last sampled Sep 2013Volunteer monitoring 2010–2013
DNR volunteers monitored this lake for about 3 years, ending in 2013. Its final monitored summers showed murky water (~2.4 ft Secchi) in 2013, high algae (chlorophyll ~29 µg/L) in 2010, and high nutrients (phosphorus ~80.5 µg/L) in 2013. After 13 years without samples, these readings describe the lake as it was, not as it is.
The DNR station record reports activity through 2015, but LakeList holds no readings after 2013 — check the station reports for anything newer.
| Year | Secchi | Chlorophyll-a | Total phosphorus |
|---|---|---|---|
| 2013 | 2.4 ft (4) | — | 80.5 µg/L (4) |
| 2012 | 3.3 ft (9) | — | 69.8 µg/L (4) |
| 2011 | 3.1 ft (11) | — | 96.3 µg/L (3) |
| 2010 | 3.4 ft (8) | 29.0 µg/L (1) | 82.4 µg/L (5) |
Castle Rock Flowage 03 (7.6 miles US of dam)Station 10031172
Historical record only — no current water-quality data exists for this lake. LakeList verified 2026-07-12.Official Wisconsin information
Plan with DNR sources
LakeList links to the authoritative record so you can verify maps, rules, and current notices before leaving.
Historical DNR depth maps3 converted map sheetsFishing regulationsVerify current seasons, limits, and restrictionsOfficial DNR lake pageFacts, advisories, boating, and water qualityWater quality reportsMonitoring stations, clarity, and DNR reportsInvasive speciesVerified, observed, and historical AIS recordsBoating ordinancesLocal slow-no-wake and water-use restrictionsFish consumption advisoriesStatewide and waterbody-specific health guidance
Historical depth maps are not for navigation. Verify regulations and access at the official source before your trip.
Historical Wisconsin DNR maps
Castle Rock Lake depth maps
3 converted map sheets. These historical surveys are not for navigation.
Navigable depth map
Castle Rock Lake · sheet 1
Pan, zoom, and inspect the converted Wisconsin DNR historical map image in the browser. Historical survey — not for navigation.
Source: Wisconsin DNR · WBIC 1345700 · image navigation only; spatial alignment pending · Historical lake maps are not for navigation.
Source: Wisconsin Department of Natural Resources. Converted for browser access with source URLs, checksums, and retrieval dates retained. Historical lake maps are not for navigation.
13,955surface acres
35max depth feet
10public access points
43.9427, -89.9653latitude, longitude
Access
Public access points
Boat launchAccess43.94467, -89.98049Managed by Wisconsin DNR
DNR verifiedDirections
Boat launchAccess near N Cypress Ln43.99870, -89.96015Managed by Wisconsin DNR
DNR verifiedDirections
Boat launchBuckhorn State Park - Nr 19th (Juneau Co)43.93325, -90.01698Managed by Wisconsin DNR
DNR verifiedDirections
Boat launchBuckhorn Wildlife Area- Nr 32nd And 16th43.95203, -90.04343Managed by Wisconsin DNR
DNR verifiedDirections
Boat launchBuckhorn Wildlife Area- Nr Cty G43.94296, -90.03972Managed by Wisconsin DNR
DNR verifiedDirections
Boat launchBuckhorn Wildlife Area - South Of Cty G - Google MapCastle Rock Lake -- Nr Ganter Ln44.00356, -90.00056Managed by Wisconsin DNR
DNR verifiedDirections
Boat launchCastle Rock Lake - Boat Launch E Ramp43.96499, -90.03531Managed by Wisconsin DNR
DNR verifiedDirections
Boat launchCastle Rock Park (Adams Co.)43.90560, -89.93970Managed by Wisconsin DNR
DNR verifiedDirections
Boat launchCounty Park Access (Juneau Co)43.88555, -89.97221Managed by Wisconsin DNR
DNR verifiedDirections
Boat launchNr 29th43.97423, -89.96952Managed by Wisconsin DNR
DNR verifiedDirections
Nearby
Trip-planning places
No nearby trip-planning places yet
Depth FAQ
How deep is Castle Rock Lake?
Castle Rock Lake is 35 feet deep at its deepest point, according to Wisconsin DNR records.
Is there a free depth map of Castle Rock Lake?
Yes. LakeList publishes a free interactive depth contour map of Castle Rock Lake at a typical 5-foot interval, with an optional 3D underwater view, derived from C-MAP Genesis community sonar (derived) survey data.
Where does the Castle Rock Lake depth map come from?
The interactive depth contours are derived from C-MAP Genesis community sonar (derived). Each contour set passes a visual QA review against the source document before it is published. The depths are derived from community sonar recordings (C-MAP Genesis Social Map, used with permission), with gaps between recordings interpolated; not for navigation.
Trust and freshness
Where this lake data comes from
Wisconsin DNR Lake Pagesname, coordinates, county, source identifiers
LakeList record updated 2026-07-12