Launch Conditions
Use cautionLaunch with caution — limited daylight.
- Advisories
- None active
- Daylight
- Past sunset (9:22 PM)
Live from the National Weather Service, USGS, and NOAA. A guide, not a substitute for official forecasts and your own judgment.
Launch Light & Moon — July 20
local timeFirst Quarter (32% illuminated). Average fishing outlook by moon phase — focus on dawn and dusk bite windows.
Location
Quick Facts: Saint Marys Lake Boat Launch
| Location | Riverton Township, Michigan |
|---|---|
| Waterbody | Saint Marys Lake |
| Access Type | Public - Free |
| Coordinates | 43.833439, -86.291797 |
| Hours | Check on site |
| County | Mason County |
Saint Marys Lake Boat Launch is a public boat launch providing access to Saint Marys Lake in Riverton Township, Michigan at coordinates 43.83344, -86.29180. Data published by Michigan Department of Natural Resources (MI DNR).
Saint Marys Lake Boat Launch is a public boat launch on Saint Marys Lake in Riverton Township, Mason County, Michigan. As a public launch it is open to all boaters; state- and county-run ramps like this are typically free or charge only a modest day-use fee. Facility details on record include launch lanes: 1, docks / piers: 1, restrooms: 1 toilet. This page shows sunrise, sunset, and moon-phase times for the launch, updated automatically. There are 6 other mapped boat ramps within about 15 miles if conditions here aren't right.
Related: boat ramp near Riverton Township • public launch in Mason County • fishing access on Saint Marys Lake • Michigan boat launch
Facilities & Amenities
| Launch Lanes | 1 |
|---|---|
| Docks / Piers | 1 |
| Restrooms | 1 toilet |
| Trailer Parking | 24 spaces |
| Managed By | DNR-PRD |
Facility details from the managing agency's public records.
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Frequently Asked Questions About Saint Marys Lake Boat Launch
Is Saint Marys Lake Boat Launch free to use?
Yes, Saint Marys Lake Boat Launch is a public boat launch with free access in Riverton Township, Michigan.
What water does Saint Marys Lake Boat Launch access?
Saint Marys Lake Boat Launch provides boat launch access to Saint Marys Lake in Riverton Township, Michigan.
How do I get to Saint Marys Lake Boat Launch?
Saint Marys Lake Boat Launch is located at coordinates 43.833439, -86.291797 in Riverton Township, Michigan. Use the "Get Directions" buttons on this page to navigate with Google Maps or Apple Maps.
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Alternative Boat Launches Nearby
The area surrounding Saint Marys Lake Boat Launch includes 6 other public boat ramps within 8.0 mi, giving boaters flexibility in choosing their access point.