Griffy Lake

Monroe County, Indiana · IN DNR bathymetric survey

30ft Max
depth

119 acres 10 contours Public access

Paddling Index79Goodelectric motors only · wooded shoreline · sheltered geometry

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Depth scale

036912151821242730

The lake

Survey readout

Griffy Lake is mapped to a depth of 30 ft on the Indiana DNR survey and covers about 119 acres in Monroe County, Indiana.

Measured from the Indiana DNR lake bathymetry survey.

Deepest mapped contour: 30 ft
Surface area: 119 acres
Shoreline: 3.97 mi · irregular
Aquatic vegetation: 11% of surface · NDVI estimate
Public access: Boat Ramp · Indiana DNR site

Additional depth details10 contours

Contour depths: 0–30 ft
Recorded point soundings: 30 ft, 12 ft, 12 ft, 9 ft, 9 ft, 9 ft

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Location

Monroe County, Indiana · the only mapped lake in this county

Chart data

Provenance

Sources: IN DNR Lake Bathymetry, USGS 3DEP, USDA NAIP (public domain), OpenStreetMap (ODbL).

⚠ Not for navigation

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Map details & sources4 sources

All layers registered to one bounding box; positions in WGS 84.

Survey-derived depth contours drape over USGS 3DEP elevation, with a USDA NAIP aerial basemap and OpenStreetMap shoreline. Color shows surveyed depth; dark lines are the survey's own isobaths.

Coordinates: 39.20192, -86.52127
IN DNR lake ID: griffy-lake
Vertical exaggeration: 2.66× below the waterline; land at true scale
Basemap: USDA NAIP · public domain
Model size: 2.1 MB

Paddling

Paddling Index methodology v1.0 · calculated 2026-09-21

79 / 100GoodData confidence: High

Griffy Lake has a heavily wooded and largely undeveloped setting, generally sheltered geometry, substantial nearby higher-volume roads. Watercraft controls: Electric motors only.

Why this score?5 components

Included in the index

Component	Rating	Points of weight	Measurement
Natural setting	Excellent	27.2 of 30	92% natural land cover within 150 m of shore (89% forest, 2% wetland; 4% developed)
Geometric wind exposure	Very Good	21.7 of 25	mean fetch 605 m · 39% of sampled water within 500 m of shelter · generally short fetch
Watercraft controls	Electric motors only	14.2 of 15	Electric motors only
Public access	Good	12.8 of 15	1 DNR fishing access site · boat ramp
Road isolation	Modest	3.2 of 15	substantial nearby higher-volume roads · 32 INDOT-classified segments within 1.2 km, peak 27,309 vehicles/day

Additional paddling considerations

These describe the lake but are not part of the v1 Paddling Index and do not change the number above.

Wake sensitivity: Moderate — narrow in places — wakes would carry across parts of the lake
Aquatic vegetation: Low — approximately 11% mapped coverage · NAIP aerial imagery (NDVI)
Observed motorized activity: Unknown — No lake-level measurement of boat traffic is available. Legal permission to operate motors is not evidence of use.
Wildlife habitat potential: High — 89% forest and 2% wetland cover within 150 m of shore

Compare Indiana lakes by Paddling Index →

How this index is calculated. The Paddling Index is a relative composite derived from lake geometry and public environmental, access, roadway and watercraft-control data. It is not a user review, a safety rating, or a prediction of an individual outing. Differences of a few points should not be treated as meaningful — an 84 and an 82 are broadly comparable. Components and weights: natural setting 30%, geometric wind exposure 25%, watercraft controls 15%, public access 15%, road isolation 15%; observed motorboat activity is weighted 0% because no defensible lake-level measurement exists. Where a component has no data the remaining weights are renormalized and the confidence rating is lowered; below Medium confidence no number is shown. Sources: USGS NHD waterbody outline, USGS/MRLC NLCD Land Cover (2021), IN DNR Fishing Access Sites (motor restrictions) (2026-08), IN DNR Fishing Access Sites (2026-08) and INDOT Annual Average Daily Traffic (2021). Conditions change quickly — check current weather and local conditions before going out.

Fish you might catch

from DNR surveys

12 species with recent evidence in this lake — sized relative to each other. Illustrations are AI-generated representative adults in everyday colors, not photographs (provenance).

Common Carp

White Sucker

Hybrid Sunfish

About these fish → the Fish of Indiana guide

Fishing rules for this lake Beta

Size and daily limits for the 12 species found here — 8 open to harvest.

These are hook-and-line size and daily limit rules. The fishing code sets no closed season for these species on inland lakes, but posted property rules can close a water — see the notes. Gear, spearing and bow fishing, netting and bait collection are set by other sections of 312 IAC 9 and are not shown here.

Black CrappieOpen to harvestMinimum size: no size limit · Daily limit: 25 (312 IAC 9-7-14(a)) Black and white crappie together.

BluegillOpen to harvestMinimum size: no size limit · Daily limit: no limit (312 IAC 9-7-14(d) · “Bluegill”)

Beta. This panel is newly published. Every value is transcribed from the Indiana Administrative Code (312 IAC 9-7) and checked against the Indiana DNR's 2026-27 Fishing Regulations Guide, but the coverage and wording are still under review. If anything here disagrees with 312 IAC 9-7 or the Indiana DNR's guide, the DNR is right — the Administrative Code is the legal text; the guide summarizes it.

No closed season in the fishing code: 312 IAC 9-7 sets no season for these species on inland lakes (trout and salmon “at any time of year”, 9-7-13(d)(1)). Posted property rules can still close a water or bar entry (312 IAC 8-2-1) and 312 IAC 9-6-6 closes a few named areas, so check the property before you go. The possession limit is twice the daily bag limit (312 IAC 9-1-12.1); fish already processed and stored at your primary residence do not count toward it (312 IAC 9-2-8(d)).

Black CrappieOpen to harvestMinimum size: no size limit · Daily limit: 25 (312 IAC 9-7-14(a)) Black and white crappie together.

BluegillOpen to harvestMinimum size: no size limit · Daily limit: no limit (312 IAC 9-7-14(d) · “Bluegill”)

Channel CatfishOpen to harvestMinimum size: no size limit · Daily limit: 10 (312 IAC 9-7-3(b), (d)) The 10 is catfish in aggregate of any size from a lake or reservoir. Of those, not more than one channel catfish 28 inches or longer, one blue catfish 35 inches or longer and one flathead catfish 35 inches or longer per day.

Common CarpOpen to harvestMinimum size: no size limit · Daily limit: no limit (312 IAC 9-7-14(d) · “Carp”)

Green SunfishRule not confidently resolvedNot named in 312 IAC 9-7 or in the DNR guide's limits table. Please check with the Indiana DNR (317-232-4200) before keeping this species.

Hybrid SunfishRule not confidently resolvedNot named in 312 IAC 9-7 or in the DNR guide's limits table. Please check with the Indiana DNR (317-232-4200) before keeping this species.

Largemouth BassOpen to harvestMinimum size: 14" · Daily limit: 5 (312 IAC 9-7-6(a), (c)(3)) The 5 is black bass in aggregate — any combination of largemouth, smallmouth and spotted bass — not 5 of each.

Longear SunfishRule not confidently resolvedNot named in 312 IAC 9-7 or in the DNR guide's limits table. Please check with the Indiana DNR (317-232-4200) before keeping this species.

Redear SunfishOpen to harvestMinimum size: no size limit · Daily limit: 25 (312 IAC 9-7-14(c))

WarmouthRule not confidently resolvedNot named in 312 IAC 9-7 or in the DNR guide's limits table. Please check with the Indiana DNR (317-232-4200) before keeping this species.

White SuckerOpen to harvestMinimum size: no size limit · Daily limit: no limit (312 IAC 9-7-14(d) · “Sucker”) Greater redhorse is endangered in Indiana (312 IAC 9-6-9) and may not be taken — identify redhorse carefully.

Yellow BullheadOpen to harvestMinimum size: no size limit · Daily limit: no limit (312 IAC 9-7-14(d) · “Bullhead”)

From 312 IAC 9-7 (Sport fishing), Indiana Administrative Code (readopted 2025-03-25), and the 2026-2027 Indiana Fishing Regulations Guide · verified 2026-09-15. Regulations can change — the Indiana Administrative Code (312 IAC 9-7) is the controlling source; verify current regulations before fishing. Official regulations

Compiled from Indiana DNR fishery surveys. Silhouettes are stylized and scaled to typical adult sizes relative to one another. Presence is not a promise — fishing isn’t a sure thing.

Fishery

surveyed 2016 and 2019

628Fish sampled

12Species

Gamefish Largemouth Bass 156 · Channel Catfish 40

Panfish Bluegill 227 · Redear Sunfish 96 · Black Crappie 24

All survey species12 species

Gamefish

Largemouth Bass156 caught · to 18″

Channel Catfish40 caught · to 17″

Panfish

Bluegill227 caught · to 8″

Redear Sunfish96 caught · to 8″

Black Crappie24 caught · to 10″

Longear Sunfish18 caught · to 6″

Warmouth18 caught · to 7″

Green Sunfish9 caught · to 7″

Hybrid Sunfish1 caught · to 6″

Bullhead & catfish

Yellow Bullhead7 caught · to 10″

Forage & nongame

White Sucker25 caught · to 18″

Common Carp7 caught · to 30″

Length is the largest fish netted in the survey, not an angler record. Source: Indiana DNR fish survey (Indiana Data Hub) (counts summed across survey years).

Non-native species records

No non-native species recorded in the available dataset. This does not confirm that no non-native species are present.

Source: Midwest Glacial Lakes Partnership Conservation Planner; underlying nonindigenous species records from the USGS Nonindigenous Aquatic Species database.

Quick answers

Griffy Lake — common questions

How deep is Griffy Lake?

The deepest contour on the Indiana DNR bathymetric survey of Griffy Lake is 30 ft. That is the deepest depth the historical survey map records, which may differ from the deepest point of the lake itself.

How big is Griffy Lake?

Griffy Lake covers about 119 acres in Monroe County, Indiana.

What fish are in Griffy Lake?

Species with survey, catch or recent-stocking evidence include channel catfish, largemouth bass, black crappie, bluegill, green sunfish, hybrid sunfish. The page lists all 12 species and the evidence behind each.

Is there public access to Griffy Lake?

Yes. The Indiana DNR lists a public access site on Griffy Lake: a boat ramp with a boat dock and restrooms. The DNR notes that an entry fee and a lake permit are required. DNR directions: "3300 N. Headley; 2 miles north of Bloomington."