Bertram Lake
Wright County, Minnesota - DNR stocking history, depth and survey data
Minnesota · Minnesota Department of Natural Resources (DNR) · DOW 86007000
Bertram Lake has no DNR stocking rows in LakeFinder; this page carries its DNR depth, access and survey data.
- Bertram Lake shows no stocking records in Minnesota DNR LakeFinder as of .
- Maximum depth 44 ft, mean depth 18 ft; surface area 111 acres, 23 littoral acres, 1.8 miles of shoreline, per the DNR lake survey.
- Average water clarity (Secchi depth) 8.0 ft.
- Fish species DNR lists here: black bullhead, black crappie, bluegill, brown bullhead, common carp, green sunfish, hybrid sunfish, largemouth bass, northern pike, pumpkinseed, yellow bullhead.
- 1 public access on the DNR list.
- Most recent DNR fish survey: (standard survey).
- Wright County, nearest town Monticello; DNR lake number (DOW) 86007000.
Depth map
Bathymetric contours from the Minnesota DNR lake survey mapped 8/28/1959 (orig map); depths in feet. Simplified for the web; not for navigation.
Public accesses
| Type | Owner | Where |
|---|---|---|
| concrete ramp | county | - No gas motors allowed, shallow water at access makes loading and unloading boats difficult. |
DNR fish survey, 2014
| Species | Gear | Catch per net | Total catch | Avg lb |
|---|---|---|---|---|
| Bluegill | Standard trap nets | 52.56 | 473 | 0.02 |
| Black crappie | Standard trap nets | 1.89 | 17 | 0.41 |
| Hybrid sunfish | Standard trap nets | 1.44 | 13 | 0.06 |
| Pumpkinseed | Standard trap nets | 0.89 | 8 | 0.04 |
| Common carp | Standard trap nets | 0.78 | 7 | 5.95 |
| Northern pike | Standard trap nets | 0.67 | 6 | 1.26 |
| Largemouth bass | Standard trap nets | 0.33 | 3 | 2.36 |
| Brown bullhead | Standard trap nets | 0.22 | 2 | 0.82 |
| Largemouth bass | Standard electrofishing | 11.54 | 8 | 2.74 |
| Northern pike | Standard gill nets | 3.50 | 14 | 1.72 |
| Common carp | Standard gill nets | 0.75 | 3 | 3.47 |
| Largemouth bass | Standard gill nets | 0.75 | 3 | 1.87 |
| Black crappie | Standard gill nets | 0.75 | 3 | 0.06 |
| Bluegill | Standard gill nets | 0.50 | 2 | 0.04 |
| Black bullhead | Standard gill nets | 0.50 | 2 | 0.09 |
Catch per net (CPUE) is the DNR survey's count per gill net or trap net set; higher means more of that species were sampled, not a fishing forecast. Top species per gear shown; where we have no verified common name for a DNR code, the code itself is shown.
Bertram Lake is a small (100 acre) lake in Wright County near the town of Monticello. It has a maximum depth of 44 feet and a large watershed dominated by agriculture and forest. A small public access is located on the south side of the lake, but only electric motors are allowed. A summer camp is located north of the lake with a swim beach along shore; the rest of the lake shore is undeveloped. The land around the lake is being purchased by Wright County and the City of Monticello to use as a park. This is the first survey since 1984. Aquatic vegetation was sparse and shallow and no invasive species were found. Aquatic plants grew to a maximum depth of only 3.0 feet, although water clarity was 8.0 feet in June and remained clear throughout the summer. Yellow waterlily and cattail surrounded much of the lake. Northern Pike numbers were within the range of expected values for lakes similar to Bertram, but pike size was small. Average length and weight were 19.4 inches and 1.4 pounds and lengths ranged from 11.9 to 25.2 inches. Only two fish were longer than 24 inches. Largemouth Bass were sampled by daytime boat electrofishing at the end of May, covering the entire shoreline. The catch rate was well below the Montrose Area average and no smaller bass were caught. Largemouth Bass ranged in length from 15.6 to 19.1 inches. Results were probably lowered by very clear, shallow water and plenty of sunshine. Many fish were seen avoiding the boat; sampling at night would likely increase the catch. Bluegill were the most abundant species in the survey, but the catch rate was still within the expected range of values. Bluegill were small, ranging from 3.0 to 7.5 inches long and averaged 3.9 inches and less than 0.1 pounds. The Black Crappie catch rate was low, but within the expected range of values. Crappies ranged from 5.0 to 12.4 inches long and averaged 8.5 inches and 0.4 pounds. Other species caught in low numbers included: Black Bullhead, Brown Bullhead, Common Carp, Green Sunfish, Hybrid Sunfish, Pumpkinseed, and Yellow Bullhead. The low number of bullheads (7 total) was surprising for the area. Yellow Perch were sampled in average numbers in 1984, but were absent in the 2014 survey.
Minnesota DNR survey narrative, .
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