Unnamed (O'Brien Res. #4)

Itasca County, Minnesota — DOW #31122500

99 Surveys

102.35

Acres

41.5 ft

Max Depth

Fish Species

Local Guides

DNR Fish Surveys

Catch-per-unit-effort (CPUE) data from Minnesota DNR fish population assessments on Unnamed (O'Brien Res. #4). Green = above normal range. Red = below normal.

Black Crappie

Date	Gear	CPUE	Normal Range	Avg Weight	Total Catch
2013-07-30	Standard gill nets	0.2 (below normal)	0.5 – 2.9	0.41 lb	1
2023-08-07	Standard trap nets	0.3 (below normal)	0.5 – 3.3	0.34 lb	3
1983-08-22	Standard trap nets	0.5 (normal)	0.5 – 3.3	0.50 lb	2
2003-08-04	Standard gill nets	6.0 (above normal)	0.5 – 2.9	0.08 lb	36
2003-08-04	Standard trap nets	6.3 (above normal)	0.5 – 3.3	0.12 lb	50
1989-07-26	Standard gill nets	0.5 (normal)	0.5 – 2.9	0.55 lb	2
1989-07-26	Standard trap nets	3.8 (above normal)	0.5 – 3.3	0.17 lb	15
2013-07-29	Backpack electrofishing	0.9	—	—	1

Northern Pike

Date	Gear	CPUE	Normal Range	Avg Weight	Total Catch
2013-07-30	Standard gill nets	5.0 (normal)	2.8 – 8.7	2.06 lb	30
2013-07-30	Standard trap nets	0.6	—	0.91 lb	5
2023-08-07	Standard gill nets	3.3 (normal)	2.8 – 8.7	1.59 lb	20
2023-08-07	Standard trap nets	0.4	—	0.99 lb	4
1983-08-22	Standard gill nets	1.8 (below normal)	2.8 – 8.7	0.83 lb	7
1983-08-22	Standard trap nets	0.3	—	5.00 lb	1
2003-08-04	Standard gill nets	4.8 (normal)	2.8 – 8.7	2.28 lb	29
2003-08-04	Standard trap nets	0.1	—	4.41 lb	1
1989-07-26	Standard gill nets	3.8 (normal)	2.8 – 8.7	2.11 lb	15
1989-07-26	Standard trap nets	0.3	—	1.30 lb	1
1978-08-07	Standard gill nets	3.3 (normal)	2.8 – 8.7	1.20 lb	10
1978-08-07	Standard trap nets	0.3	—	0.25 lb	1

White Sucker

Date	Gear	CPUE	Normal Range	Avg Weight	Total Catch
2013-07-30	Standard gill nets	2.0 (normal)	0.5 – 2.9	1.64 lb	12
2023-08-07	Standard gill nets	0.7 (normal)	0.5 – 2.9	2.14 lb	4
1983-08-22	Standard gill nets	0.3 (below normal)	0.5 – 2.9	0.50 lb	1
2003-08-04	Standard gill nets	3.3 (above normal)	0.5 – 2.9	0.78 lb	20
2003-08-04	Standard trap nets	0.5 (normal)	0.3 – 0.7	1.74 lb	4
1989-07-26	Standard gill nets	1.0 (normal)	0.5 – 2.9	2.05 lb	4
1978-08-07	Standard gill nets	2.0 (normal)	0.5 – 2.9	0.68 lb	6

Hybrid Sunfish

Date	Gear	CPUE	Normal Range	Avg Weight	Total Catch
2013-07-30	Standard trap nets	0.4	—	0.04 lb	4
2013-07-29	Backpack electrofishing	1.9	—	—	2

Bluegill

Date	Gear	CPUE	Normal Range	Avg Weight	Total Catch
2013-07-30	Standard trap nets	3.7 (below normal)	5.7 – 40.5	0.06 lb	33
2013-07-30	Standard gill nets	1.0	—	0.08 lb	6
2023-08-07	Standard trap nets	4.0 (below normal)	5.7 – 40.5	0.08 lb	36
2023-08-07	Standard gill nets	2.0	—	0.11 lb	12
2003-08-04	Standard gill nets	5.7	—	0.07 lb	34
2003-08-04	Standard trap nets	25.4 (normal)	5.7 – 40.5	0.06 lb	203
1989-07-26	Standard trap nets	7.5 (normal)	5.7 – 40.5	0.13 lb	30
1989-07-26	Standard gill nets	0.5	—	0.10 lb	2
2013-07-29	Backpack electrofishing	42.1	—	—	45
2013-07-29	15-ft beach seine	1.0	—	—	1

Yellow Perch

Date	Gear	CPUE	Normal Range	Avg Weight	Total Catch
2013-07-30	Standard trap nets	2.1 (normal)	0.5 – 3.8	0.17 lb	19
2013-07-30	Standard gill nets	4.3 (normal)	1.5 – 23.0	0.50 lb	26
2023-08-07	Standard trap nets	0.2 (below normal)	0.5 – 3.8	0.21 lb	2
2023-08-07	Standard gill nets	1.3 (below normal)	1.5 – 23.0	0.38 lb	8
2003-08-04	Standard trap nets	6.4 (above normal)	0.5 – 3.8	0.14 lb	51
2003-08-04	Standard gill nets	6.8 (normal)	1.5 – 23.0	0.12 lb	41
1989-07-26	Standard trap nets	0.5 (normal)	0.5 – 3.8	0.15 lb	2
1989-07-26	Standard gill nets	4.0 (normal)	1.5 – 23.0	0.15 lb	16
2013-07-29	Backpack electrofishing	27.1	—	—	29
2013-07-29	15-ft beach seine	4.0	—	—	4

Largemouth Bass

Date	Gear	CPUE	Normal Range	Avg Weight	Total Catch
2013-07-30	Standard trap nets	0.4 (normal)	0.3 – 1.6	0.33 lb	4
2013-07-30	Standard electrofishing	94.2	—	0.73 lb	102
2013-07-30	Standard gill nets	1.3 (normal)	0.3 – 1.5	1.26 lb	8
2023-08-07	Standard trap nets	0.2 (below normal)	0.3 – 1.6	0.28 lb	2
2023-08-07	Standard gill nets	0.8 (normal)	0.3 – 1.5	0.80 lb	5
2003-08-04	Standard electrofishing	42.6	—	0.78 lb	51
2003-08-04	Standard gill nets	1.3 (normal)	0.3 – 1.5	0.74 lb	8
2003-08-04	Standard trap nets	2.9 (above normal)	0.3 – 1.6	0.12 lb	23
1989-07-26	Standard trap nets	1.5 (normal)	0.3 – 1.6	0.08 lb	6
1989-07-26	Standard gill nets	0.5 (normal)	0.3 – 1.5	0.55 lb	2
2013-07-29	Backpack electrofishing	152.3	—	—	163
2013-07-29	15-ft beach seine	23.0	—	—	23

Walleye

Date	Gear	CPUE	Normal Range	Avg Weight	Total Catch
2013-07-30	Standard gill nets	1.8 (normal)	0.5 – 3.3	1.68 lb	11
2023-08-07	Standard gill nets	1.8 (normal)	0.5 – 3.3	1.31 lb	11
2003-08-04	Standard gill nets	0.7 (normal)	0.5 – 3.3	2.43 lb	4
1989-07-26	Standard gill nets	1.0 (normal)	0.5 – 3.3	0.42 lb	4

Brown Bullhead

Date	Gear	CPUE	Normal Range	Avg Weight	Total Catch
2013-07-30	Standard trap nets	0.1 (below normal)	0.5 – 2.2	1.41 lb	1

Yellow Bullhead

Date	Gear	CPUE	Normal Range	Avg Weight	Total Catch
2013-07-30	Standard gill nets	0.5 (normal)	0.5 – 11.0	0.85 lb	3
2013-07-30	Standard trap nets	0.2 (below normal)	1.0 – 8.4	1.19 lb	2
2003-08-04	Standard gill nets	0.7 (normal)	0.5 – 11.0	0.98 lb	4
2003-08-04	Standard trap nets	0.8 (below normal)	1.0 – 8.4	0.99 lb	6
1989-07-26	Standard gill nets	0.3 (below normal)	0.5 – 11.0	0.50 lb	1

Pumpkinseed

Date	Gear	CPUE	Normal Range	Avg Weight	Total Catch
2013-07-30	Standard trap nets	0.4 (below normal)	1.3 – 6.3	0.05 lb	4
2023-08-07	Standard gill nets	0.2	—	0.11 lb	1
2023-08-07	Standard trap nets	0.4 (below normal)	1.3 – 6.3	0.04 lb	4
2003-08-04	Standard trap nets	1.5 (normal)	1.3 – 6.3	0.05 lb	12
1989-07-26	Standard gill nets	1.8	—	0.19 lb	7
1989-07-26	Standard trap nets	2.5 (normal)	1.3 – 6.3	0.07 lb	10
1978-08-07	Standard trap nets	6.3 (normal)	1.3 – 6.3	0.20 lb	25
1978-08-07	Standard gill nets	1.7	—	0.20 lb	5

Rock Bass

Date	Gear	CPUE	Normal Range	Avg Weight	Total Catch
2023-08-07	Standard trap nets	1.8 (normal)	0.5 – 2.8	0.20 lb	16
2023-08-07	Standard gill nets	10.8 (above normal)	0.5 – 2.0	0.35 lb	65

Black Bullhead

Date	Gear	CPUE	Normal Range	Avg Weight	Total Catch
2023-08-07	Standard trap nets	0.1 (below normal)	0.3 – 2.8	0.13 lb	1
1983-08-22	Standard gill nets	44.0 (above normal)	0.5 – 11.0	0.12 lb	176
1983-08-22	Standard trap nets	0.3 (below normal)	0.3 – 2.8	0.20 lb	1
1989-07-26	Standard gill nets	10.0 (normal)	0.5 – 11.0	0.41 lb	40
1989-07-26	Standard trap nets	0.8 (normal)	0.3 – 2.8	0.60 lb	3
1978-08-07	Standard gill nets	19.3 (above normal)	0.5 – 11.0	0.13 lb	58
1978-08-07	Standard trap nets	0.5 (normal)	0.3 – 2.8	0.20 lb	2

Common Shiner

Date	Gear	CPUE	Normal Range	Avg Weight	Total Catch
2003-08-04	Standard gill nets	0.2	—	0.07 lb	1

CNM

Date	Gear	CPUE	Normal Range	Total Catch
2013-07-29	Backpack electrofishing	5.6	—	6

Johnny Darter

Date	Gear	CPUE	Normal Range	Total Catch
2013-07-29	Backpack electrofishing	4.7	—	5

Green Sunfish

Date	Gear	CPUE	Normal Range	Total Catch
2013-07-29	Backpack electrofishing	0.9	—	1
2013-07-29	15-ft beach seine	1.0	—	1

Tadpole Madtom

Date	Gear	CPUE	Normal Range	Total Catch
2013-07-29	Backpack electrofishing	0.9	—	1

Iowa Darter

Date	Gear	CPUE	Normal Range	Total Catch
2013-07-29	15-ft beach seine	4.0	—	4
2013-07-29	Backpack electrofishing	0.9	—	1

Golden Shiner

Date	Gear	CPUE	Normal Range	Total Catch
2013-07-29	Backpack electrofishing	0.9	—	1

Bluntnose Minnow

Date	Gear	CPUE	Normal Range	Total Catch
2013-07-29	Backpack electrofishing	24.3	—	26

BNS

Date	Gear	CPUE	Normal Range	Total Catch
2013-07-29	15-ft beach seine	1.0	—	1

Depth Maps & Lake Info

View on MN DNR LakeFinder

Map & Directions

Get Directions

Showing 14 nearby bait & tackle shops on the map.

Nearby Marinas

Bass Lake public Water Access - Whispering Pines

Grand Rapids, MN

★ 3

Grand Rapids Marine

Grand Rapids, MN

(218) 326-0351

★ 4.3

Grand Rapids Marine

Grand Rapids, MN

Marine Clinic

Grand Rapids, MN

(218) 244-4281

★ 4.9

Mishawaka Outdoors LLC

Grand Rapids, MN

(218) 812-8888

NorthStar Barge

Grand Rapids, MN

(218) 269-0566

★ 5

Resorts & Lodges Near Unnamed (O'Brien Res. #4)

Plan your stay — fishing resorts and lodges near Unnamed (O'Brien Res. #4).

Anchor Inn Resort

Fishing Resort Spring Lake

(218) 659-2718

Birch Haven Resort Closed

Fishing Resort Bovey

(218) 910-9707

Bowen Lodge

Fishing Resort Deer River

(218) 246-8707

Loon Point Resort

Fishing Resort Bigfork

(218) 245-1470

View all 888 Minnesota resorts →

Fish Species

Species known to inhabit Unnamed (O'Brien Res. #4). Click any species for a full fishing guide.

Black Bullhead Black Crappie Bluegill Largemouth Bass Northern Pike Pumpkinseed Rock Bass Walleye White Sucker Yellow Perch

Fishing Guides Near Unnamed (O'Brien Res. #4)

Bro's Guide Service

Fishing Guide

(218) 340-6051

Early Bird Fishing Guide Jeff Sundin

Fishing Guide

(218) 245-9858

Grand Rapids Guide Service

Fishing Guide

(218) 259-7140

Minnesota Fishing Connections

Fishing Guide

(218) 259-2628

MN Fishing Pros

Fishing Guide

(218) 244-2517

Moo Moo's Guide Service

Fishing Guide

(218) 398-7593

View all 9 guides →

Other Lakes in Itasca County

Plan Your Trip to Unnamed (O'Brien Res. #4)

Weather forecast for Unnamed (O'Brien Res. #4) — check wind, rain, and temperature before you go
GPS: 47.3839°N, 93.1348°W — Get Directions
View on MN DNR LakeFinder for the latest survey data and lake info
Review Minnesota fishing regulations for season dates and limits
A Minnesota fishing license is required for ages 16+ — buy online at dnr.state.mn.us

Data sourced from Minnesota DNR Division of Fish and Wildlife. Last verified: March 19, 2026. Learn how we maintain this data.

Unnamed (O'Brien Res. #4)

DNR Fish Surveys

Black Crappie

Northern Pike

White Sucker

Hybrid Sunfish

Bluegill

Yellow Perch

Largemouth Bass

Walleye

Brown Bullhead

Yellow Bullhead

Pumpkinseed

Rock Bass

Black Bullhead

Common Shiner

CNM

Johnny Darter

Green Sunfish

Tadpole Madtom

Iowa Darter

Golden Shiner

Bluntnose Minnow

BNS

Depth Maps & Lake Info

Map & Directions

Nearby Bait & Tackle

Best Bet Waxworm Wholesale Bait & Breeder Kits

Bite Me Waxworms Wholesale Bait Shop

Diamond Custom Rods

Fred's Live Bait & Tackle

Frontier Sports

Glen's Army & Navy Store

God's Country Outfitters

Hollywood Bait

Nearby Marinas

Bass Lake public Water Access - Whispering Pines

Grand Rapids Marine

Grand Rapids Marine

Marine Clinic

Mishawaka Outdoors LLC

NorthStar Barge

Resorts & Lodges Near Unnamed (O'Brien Res. #4)

Fish Species

Fishing Guides Near Unnamed (O'Brien Res. #4)

Other Lakes in Itasca County

Alice

Allen

Amen

Anderson

Ann

Antler

Plan Your Trip to Unnamed (O'Brien Res. #4)