Early ice-out called on Lake Minnetonka
Media inquiries: Please contact Chris O'Brien, cobrien@freshwater.org, 651-703-8873
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Freshwater and the Hennepin County Sheriff’s Office Water Patrol declared ice-out on Lake Minnetonka on March 29, a sure sign of spring for the Twin Cities’ largest lake.

This year’s milestone is more than two weeks earlier than Lake Minnetonka’s median ice-out date of April 13. Last year, ice-out was declared on March 13, 2024, the second earliest date on record for the lake.

Ice-out is observed when a boat is able to safely navigate from any shore to any other shore, through any channel, and around any island without being stopped by hard ice. Accompanying the water patrol each year are staff or board members from Freshwater, whose founder Dick Gray developed a system for observing ice-out on the lake back in the 1960’s.

Ice-out records on Lake Minnetonka date back to 1855 and are a valuable method for revealing long-term trends. The earliest ice-out on record for the lake was March 11, 1878.

There is no one way to determine ice-out on lakes; methods vary from lake to lake, so consistency from year to year is what researchers and agencies such as the Minnesota Department of Natural Resources prefer to see. Ice-out records for lakes across the state are listed on the DNR website.

Historically, Lake Minnetonka ice-out has been determined by a number of methods — such as when a car placed on the ice fell through or when a boat could travel from Excelsior to Wayzata. Read a 2003 column by Dick Gray about the glacial origins of this iconic Minnesota lake.