Upper Trelipe Lake
Cass County, Minnesota, near Longville. DNR lake ID 11010500.
Upper Trelipe Lake is a 421.4-acre lake in Cass County, Minnesota, near Longville. Its deepest point reaches 69 ft, and about 34% of the lake is shallower than 15 feet. Summer water clarity averages 13.6 feet in Minnesota Pollution Control Agency monitoring, which places it in the mesotrophic nutrient class. It is not on the DNR infested waters list as of September 2026. DNR surveys document walleye, northern pike, largemouth bass, smallmouth bass, black crappie, bluegill.
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Quick facts
| DNR lake ID | 11010500 |
|---|---|
| County | Cass County, near Longville |
| Surface area | 421.4 acres |
| Maximum depth | 69 ft |
| Share under 15 ft | 34% |
| Water clarity (summer) | 13.6 ft through 2025 |
| Phosphorus (summer) | 12.5 µg/L |
| Algae, chlorophyll-a (summer) | 3.5 µg/L |
| Nutrient class | Mesotrophic |
| Clarity trend | Steady (2016 to 2025) |
| Invasive species | Not on DNR infested waters list (Sept 2026) |
| Public water accesses | 1 |
Water quality
Summer averages from Minnesota Pollution Control Agency monitoring through 2025: clarity 13.6 ft, phosphorus 12.5 µg/L, algae (chlorophyll-a) 3.5 µg/L. Using the Carlson trophic state index, Upper Trelipe Lake rates as mesotrophic. Summer clarity trend 2016 to 2025: steady.
Fishing on Upper Trelipe Lake
The most recent DNR standard fish survey was in 2019 (7 years ago). Catch per net is compared with the DNR’s typical range for lakes of the same type.
| Species | Net | Catch per net | Typical range |
|---|---|---|---|
| Walleye | gill | 2.11 | 1.0 to 5.0 |
| Walleye | trap | 0.33 | 0.2 to 0.7 |
| Northern pike | gill | 3.89 | 2.2 to 8.7 |
| Northern pike | trap | 0.56 | n/a |
| Yellow perch | gill | 1.22 | 1.5 to 13.8 |
| Yellow perch | trap | 2.67 | 0.4 to 2.3 |
| Black crappie | gill | 4.89 | 0.3 to 1.7 |
| Black crappie | trap | 3.11 | 0.5 to 2.2 |
| Bluegill | gill | 4.11 | n/a |
| Bluegill | trap | 2.78 | 7.7 to 43.4 |
| Largemouth bass | gill | 4.22 | 0.5 to 1.7 |
| Largemouth bass | trap | 1.0 | 0.4 to 1.5 |
| Smallmouth bass | gill | 0.44 | 0.2 to 1.6 |
| Smallmouth bass | trap | 0.22 | 0.2 to 0.8 |
| Tullibee (cisco) | gill | 3.56 | 1.3 to 10.4 |
| Pumpkinseed | gill | 1.11 | n/a |
| Pumpkinseed | trap | 1.11 | 1.4 to 5.9 |
| Rock bass | gill | 1.22 | 0.7 to 4.4 |
| Rock bass | trap | 1.11 | 0.8 to 3.7 |
| Hybrid sunfish | gill | 1.67 | n/a |
| Hybrid sunfish | trap | 1.22 | n/a |
Walleye catch was within the typical range for similar lakes in that survey.
Largest fish measured in recent DNR samples: Northern pike 39.0 in (2019), Largemouth bass 18.0 in (2019), Walleye 20.0 in (2019), Smallmouth bass 18.0 in (2019).
Game and panfish documented since 2005: Walleye, Northern pike, Largemouth bass, Smallmouth bass, Black crappie, Bluegill, Yellow perch, Pumpkinseed, Hybrid sunfish, Rock bass, Green sunfish, Tullibee (cisco), Bowfin, White sucker, Yellow bullhead, Brown bullhead.
Fishing regulations
- Sunfish daily limit 5. (DNR Quality Sunfish Initiative)
Regulations change. Confirm with the DNR before fishing.
Invasive species
Not on the Minnesota DNR infested waters list as of September 2026. That means no confirmed listing, not a guarantee the lake is free of invasive species.
Public boat access
- Upper Trelipe Lake: 1 concrete slab launch ramp, 1 dock, 4 trailer spaces. 11 mi E of Longville off Cnty Rd 7 on W shore. Directions
DNR water access records (2023). Confirm current conditions with the DNR.
Nearby lakes
- Laura Lake 1.2 mi, Cass County
- Little Bass Lake 1.6 mi, Cass County
- Lower Trelipe Lake 2.0 mi, Cass County
- Wax Lake 3.0 mi, Cass County
- Island Lake 3.3 mi, Cass County
- Mitten Lake 3.4 mi, Cass County
- Thunder Lake 3.4 mi, Cass County
- Twin Lake 3.6 mi, Cass County
Questions about Upper Trelipe Lake
How deep is Upper Trelipe Lake?
Upper Trelipe Lake reaches a maximum depth of 69 ft according to Minnesota DNR records. About 34% of the lake is shallower than 15 feet.
How big is Upper Trelipe Lake?
Upper Trelipe Lake covers about 421.4 acres in Cass County, Minnesota.
How clear is Upper Trelipe Lake?
Summer water clarity on Upper Trelipe Lake averages 13.6 feet (Secchi depth) in MPCA monitoring through 2025. Its trophic state is mesotrophic.
Does Upper Trelipe Lake have zebra mussels or other invasive species?
Upper Trelipe Lake is not on the Minnesota DNR infested waters list as of September 2026. That means there is no confirmed listing; it is not a guarantee the lake is free of invasive species.
What fish are in Upper Trelipe Lake?
Minnesota DNR surveys document walleye, northern pike, largemouth bass, smallmouth bass, black crappie, bluegill, yellow perch, pumpkinseed, hybrid sunfish, rock bass in Upper Trelipe Lake. The most recent standard survey was in 2019.
Where is the public boat access on Upper Trelipe Lake?
Upper Trelipe Lake has 1 public water access site on DNR record: Upper Trelipe Lake.
How is the walleye population on Upper Trelipe Lake?
In Minnesota DNR net surveys from 1998 to 2019, walleye numbers on Upper Trelipe Lake ran mostly above the typical range for similar lakes. Nets measure how many fish a lake holds, not where they’re biting, so local guides are the best source for current fishing.
Are there lake homes for sale on Upper Trelipe Lake?
Homes on Upper Trelipe Lake come up for sale throughout the year, and some sell before they’re ever publicly advertised. Tell us what you’re looking for and our agents will run a custom search and send you matching homes on Upper Trelipe Lake and nearby lakes, including off-market opportunities when available.
What is it like to live on Upper Trelipe Lake?
A mid-size lake with room for boating and fishing, about 34% shallow shoreline under 15 feet, and summer clarity around 13.6 feet. Conditions vary by property, so walk the frontage and ask us what similar homes have sold for.
Are there special fishing regulations on Upper Trelipe Lake?
Yes. Sunfish daily limit 5.
Ask us about Upper Trelipe Lake
Whether you’re buying, selling, or just curious, our team works Cass County lakes every day. Send us a note or call (218) 656-6469.
Sources: Minnesota DNR LakeFinder records, DNR fish surveys (latest 2019), DNR infested waters list (Sept 2026), Minnesota Rules 6264.0400 (April 2026), MPCA monitoring via the Water Quality Portal, DNR water access records (2023), LAGOS-US. Lakewide information from public data; it does not describe any specific property. Verify shoreline, bottom type, and depth at any frontage.