|Nearest Town: 9 mi. N & 3 mi. W of Ely
Primary County: St. Louis
|Survey Date: 05/26/2004|
Inventory Number: 69-0081-00
|Other||Carry-in||Public portage established through prescriptive use. Trail is approximately 1/2 mi. & crosses private land.|
|Did you know? Each year, the MinnAqua program teaches youth and families across Minnesota about aquatic biology, fishing, and conservation..|
|Species||Number of fish per net||
Average Fish Weight (lbs)
Normal Range (lbs)
|Brook Trout||Gill net||1.0||N/A - N/A||0.10||N/A - N/A|
|White Sucker||Gill net||3.5||1.0 - 8.9||0.98||0.4 - 1.7|
|Species||Number of fish caught in each category (inches)|
|For the record, the largest Bowfin taken in Minnesota weighed 11 lbs., 4 oz. and was caught: |
Statistics: 35" length, 20" girth
Fish Stocked by Species for the Last Ten Years
|1 - indicates fish purchased and stocked by private citizens and sporting groups.|
|2 - indicates fish purchased by the DNR for stocking.|
|Stocking Fish Sizes|
|Fry - Newly hatched fish that are ready to be stocked usually called "swim-ups". Walleye fry are 1/3 of an inch or around 8 mm.|
|Fingerling - Fingerlings are one to six months old and can range from a size of one to twelve inches depending on the species. Walleye fingerlings range from three to eight inches each fall.|
|Yearling - Yearling fish are at least one year old. A one-year-old fish can range from three to twenty inches depending on the species. Walleye yearlings average from six to twelve inches.|
|Adult - Adult fish are fish that have reached maturity. Depending on the species, maturity can be reached at two years of age. Walleye reach maturity between the ages of four and six years.|
Regenbogen Lake is in Ecological Lake Class 9, which consists of 48 lakes in northeast Minnesota that are small, shallow, and round, and have very soft (unmineralized) water. Regenbogen Lake was thermally stratified on 05/26/2004 with a surface temperature of 54 F and a bottom temperature of 41 F. Adequate oxygen for trout (more than 5 ppm) was retained to a depth of 14 ft, where the temperature was 45 F. Adequate oxygen for warmwater fish (more than 2 ppm) was retained to a depth of 15 ft, where the temperature was 44 F. Under-ice oxygen has dropped below 2 ppm in severe winters, the most recent of which was in 1996 when a maximum of 1.5 ppm was found. Two small inlets drain local swamps and there is no outlet. Lake bottom substrates along the shoreline are mostly sand, with some muck, ledgerock, and boulder. Aquatic vegetation is sparse and consists mostly of shoreline fringe plants and waterlilies.
Regenbogen Lake was poisoned with rotenone in 1955, which removed indigenous populations of northern pike, yellow perch, largemouth bass, and minnows. Rainbow trout were stocked annually from 1958 through 1983, and brook trout fingerlings were stocked annually from 1984 to the present. Eleven trout stocking assessments from 1977 through 2004 used 1-4 gillnets, set mostly in late May or early June.
Two 6" brook trout were caught in the 2004 assessment. Both of these trout had been stocked the previous fall as fingerlings. One of these trout had insect remains in its stomach, the other had an empty stomach.
By weight, the trout catch of 0.1 lb/gillnet in 2004 was lower than the median catch of 1.0 lb/gillnet in all previous assessments on this lake and was lower than the median trout catch (all species combined) of 2.5 lbs/gillnet in recent assessments of 25 stream trout lakes in the Tower Fisheries Management Area.
White sucker (3.5/gillnet, averaging 13" in length) were also captured in the 2004 assessment. Low numbers of sucker (0.5-5.0/gillnet) have been captured in most assessments since they were first observed in 1980.
|For more information on this lake, contact:||Lake maps can be obtained from:|
For general DNR Information, contact:
DNR Information Center
500 Lafayette Road
St. Paul, MN 55155-4040
TDD: (651) 296-6157 or (888) MINNDNR
Turn in Poachers (TIP):
Toll-free: (800) 652-9093