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For the smallmouth bass herePiscifun AlinoX 300 low profile baitcaster34% OFFSale $104.99 $159.99
Yonkers 31 mi
Photo: Famartin, CC BY-SA 4.0 
Mount Vernon 33 mi
Photo: RoySmith, CC BY-SA 4.0 
Bronx County 37 mi
Photo: GK tramrunner RU, CC BY-SA 4.0 
Long Island Sound 46 mi
Photo: Russ, CC BY 2.0
New York lakes and reservoirs
Pick for smallmouth bassPiscifun Chaos Pro CNC baitcasting reel25% OFFSale $97.99 $129.99
Lake Mahopac Fishing
A 598-acre New York lake in Putnam County.
Pick for smallmouth bassPiscifun Chaos Pro CNC baitcasting reel25% OFFSale $97.99 Photo, nearby stand in for Lake Mahopac: Vincent de Lagabbe, CC BY-SA 3.0
Putnam County
Lake Mahopac: size, place and access
Lake Mahopac is a lake of about 598 acres, its outline lying in Putnam County. DEC files the shoreline owner as Private. Head to Mahopac, under a mile away, for food and fuel. It falls in DEC Region Lower Hudson Valley.
Fish on the DEC list here: smallmouth bass, largemouth bass, yellow perch, black crappie and brown bullhead. The DEC list describes the launch as trailer improved. Its ice entry reads ice fishing permitted.
598acres
0launches
5species on file
1counties
NYS Hydrography (NHD) outline, DEC Recommended Fishing Lakes and Ponds, Census places, retrieved October 24, 2026.
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Fish DEC has found in Lake Mahopac
DEC sources tie these fish to Lake Mahopac; more species surely swim there.
DEC Recommended Fishing Lakes and Ponds species column, DEC stocking lists and state records, retrieved October 24, 2026.
Access
Launches on Lake Mahopac
DEC maps no launch site right on Lake Mahopac; try one of those listed next.
More boat launches near Lake Mahopac
- California Hill State Forest LaunchWaywayanda Lake, 4 miles northwest
- Clarence Fahnestock State Park on Stillwater PondStillwater Pond, 6 miles northwest
- Clarence Fahnestock State Park on Canopus LakeCanopus Lake, 7 miles northwest
- Franklin D. Roosevelt State ParkMohansic Lake, 8 miles southwest
DEC boat launch and fishing access layers, retrieved October 24, 2026.
Limits
Seasons and creel rules at Lake Mahopac
| Species | Daily limit and size | Season |
|---|---|---|
| Lake trout | 3; minimum 21" | Apr 1 – Oct 15 |
| Largemouth and smallmouth bass (Jun 15 to Nov 30) | 5; minimum 12" | Jun 15 – Nov 30 |
| Largemouth and smallmouth bass (Dec 1 to Jun 14) | No harvest; Catch and release only | Dec 1 – Jun 14 |
| Muskellunge | 1; minimum 40" | Jun 1 – Nov 30 |
| Tiger muskellunge | 1; minimum 30" | May 1 – Mar 15 |
| Northern pike | 5; minimum 18" | May 1 – Mar 15 |
| Chain pickerel | 5; minimum 15" | May 1 – Mar 15 |
| Walleye | 5; minimum 15" | May 1 – Mar 15 |
| Black and white crappie | 25; minimum 10" | All year |
| Yellow perch | 50 | All year |
| Sunfish | 25 | All year |
| American eel | 25; minimum 9" | All year |
Statewide DEC limits govern Lake Mahopac wherever a county rule below does not replace them.
2026 DEC freshwater fishing regulations (statewide table effective April 1, 2026); county special regulations from the DEC region pages; retrieved October 24, 2026, figures checked against the DEC pages October 25, 2026.
Records
Heaviest New York fish from Lake Mahopac
| Species | Weight | Angler | Year |
|---|---|---|---|
| Bullhead, Brown | 7 lb. 6 oz. | Glenn Collacuro | 2009 |
DEC current state record fish table, retrieved October 24, 2026. All New York records.
Compare
Comparing Lake Mahopac with nearby water
| Lake | Distance | Acres | Launches | DEC species | Stocked 2023-26 |
|---|---|---|---|---|---|
| Lake Mahopac | 598 | 0 | 5 | ||
| West Branch Reservoir near Carmel, Putnam County | 3 miles northeast | 764 | 0 | 8 | yes |
| Lake Gilead | 3 miles east | 124 | 0 | 5 | yes |
| Croton Falls Reservoir near Carmel, Putnam County, 603 acres | 4 miles east | 603 | 0 | 6 | yes |
| Lake Gleneida | 4 miles northeast | 178 | 0 | 5 | yes |
| Croton Falls Reservoir near Carmel, Putnam County, 92 acres | 4 miles east | 92 | 0 | 0 | yes |
NYS Hydrography, DEC launch layers, DEC lake list and stocking lists, retrieved October 24, 2026.
Nearby
A few miles from Lake Mahopac
New York lakes in the Lake Mahopac area
- West Branch Reservoir near Carmel, Putnam County3 miles northeast
- Lake Gilead3 miles east
- Croton Falls Reservoir near Carmel, Putnam County, 603 acres4 miles east
- Lake Gleneida4 miles northeast
- Croton Falls Reservoir near Carmel, Putnam County, 92 acres4 miles east
Shops worth a stop en route to Lake Mahopac
- Dick's Sporting Goods, 650 Lee Blvdsporting goods store, Yorktown Heights, 5 miles
- Lets Go Fishing Suppliesbait and tackle shop, Peekskill, 11 miles
- Peekskill Fishing Suppliesbait and tackle shop, Peekskill, 12 miles
- Charles Point Marinamarina, Westchester, 13 miles
- Croton Bait & Tacklebait and tackle shop, Croton-on-Hudson, 15 miles
- Viking Boat Yardmarina, Westchester, 15 miles
Towns handy for Lake Mahopac trips
- Mahopacunder a mile
- Carmel3 miles
- Heritage Hills3 miles
Counties along Lake Mahopac
- Putnam Countycounty seat Carmel Hamlet
Piscifun
Piscifun picks for fishing Lake Mahopac
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Photographs
Shores, kills and lakes by Lake Mahopac, pictured
Photo: Famartin, CC BY-SA 4.0
Photo: RoySmith, CC BY-SA 4.0
Photo: GK tramrunner RU, CC BY-SA 4.0
Photo: Russ, CC BY 2.0
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Answers
Lake Mahopac, asked and answered for Empire State anglers
Which New York county is Lake Mahopac in?
Find it in Putnam County, DEC Lower Hudson Valley, under a mile from Mahopac.
How wide a footprint does Lake Mahopac have?
598 acres, give or take.
Which launch site sits closest to Lake Mahopac?
The launch layers list none.
Does Lake Mahopac hold bass or trout?
DEC files list smallmouth bass, largemouth bass, yellow perch, black crappie and brown bullhead.
Which DEC rules cover Lake Mahopac?
Largemouth and smallmouth bass (Jun 15 to Nov 30): 5; minimum 12"; Jun 15 – Nov 30.
What is the out-of-state fee for angling at Lake Mahopac?
Anglers 16 and older need a DEC freshwater fishing license: $25.00 a year for residents, $50.00 for nonresidents, $5.00 for residents 70 and older, with 1-day and 7-day options.
Does DEC stock Lake Mahopac?
DEC lists no recent stocking here.
Which listed tackle counter is nearest Lake Mahopac?
Dick's Sporting Goods sits about 5 miles from the water.
Which DEC record belongs to Lake Mahopac?
Bullhead, Brown, 7 lb. 6 oz., by Glenn Collacuro in 2009.
Does DEC permit ice fishing at Lake Mahopac?
DEC notes Ice Fishing Permitted.
Hitch up and haul the boat to Lake Mahopac
Every New York fee and season sits on one page.