Frozen Assets cancels all Lake Mendota events due to poor ice conditions

Due to continued warm weather, Clean Lakes Alliance has made the decision to cancel all Frozen Assets events scheduled to take place on Lake Mendota. The decision was made after multiple days of drilling test holes in Lake Mendota, as well as speaking with experts at the University of Wisconsin-Madison, a local meteorologist, and local law enforcement officials. Events including skydiving, Kites on Mendota, snowshoeing, pond hockey, and the Mary B will not be at Frozen Assets this year.

Read More

2023 5K Day-of-Registration

February 4, 2023 @ 10:00 am 12:30 pm

Join Clean Lakes Alliance for our Frozen Assets 5K Run/Walk on Saturday, February 4th, 2023 at 10 a.m. and run or walk ENTIRELY on a frozen lake!

Take a break from the hilly pavement and bring your stride to the ice. In this 5K race, participants will run, walk, or snowshoe across the ice on iconic Lake Mendota with beautiful views of downtown Madison. The course will start and end at The Edgewater, right in the heart of the Frozen Assets Festival!

2023 5K Day-of-Registration


Your registration to this event includes admission to the race, an event t-shirt, and optional chip timing! Online registration closes Monday, January 30th for in-person participants. Registration closes on Sunday, February 5th for virtual participants. The registration pricing schedule is below:

  • $45 In-Person Participant : Through Monday, January 30th at 11:59 p.m.
  • $50 Day-of Registration : Saturday, February 4th (Register at The Edgewater from 8 – 9:30 a.m. on Saturday, February 4th or at early packet pickup at The Edgewater on Wednesday, February 1st from 3-7 p.m.))
  • $55 Virtual Participant : Includes shipping charges for t-shirt and event materials
  • FREE for children 10 & under with purchase of adult registration

Best of all, your registration supports work to protect and improve water quality in our lakes!


The event will be chip-timed for runners, or sign up for the walk pass for an untimed event. The top three male and female finishers will receive awards. Or, register to participate virtually.

Packet Pick Up

Early Packet Pick Up: Wednesday, February 1st, 3-7 p.m. Beat the rush on race day and pick up your packet early on 5th floor of The Edgewater (immediately inside The Edgewater’s entrance from the parking garage).

Same-Day Packet Pick Up: Saturday, February 4th, 8-9:30 a.m. INSIDE The Edgewater on Level 5 (immediately inside The Edgewater’s entrance from the parking garage on the ice rink level).

Virtual Participants: Clean Lakes Alliance will mail your t-shirt(s) and event materials to you in mid-February.


If you choose to participate virtually, your t-shirt(s) will be mailed to you in mid-February.

Ice Access

You may access the ice down The Edgewater outdoor stairs, indoors through The Edgewater, at the end of N. Carroll Street to the west, and from James Madison Park to the east.

Terms & Conditions of Entry

By registering for this event, you agree to the Frozen Assets 5K Terms & Conditions of Entry. All entrants must read and agree to this declaration.

Frozen Assets Festival

The annual Frozen Assets Festival will take place on Saturday, February 4th at The Edgewater. As always, this family-friendly daytime event will be FREE and open to all. Learn more at cleanlakesalliance.org/frozen-assets.


Race organizers reserve the right to alter the course due to factors including, but not limited to, ice conditions and weather. If conditions are deemed unsafe, the event may be canceled or moved to an alternate location. Participants will be notified of any changes ahead of the event.

Free Post-race Beverage

All participants 21+ will receive a ticket for a free Michelob Ultra or Michelob Ultra Organic Seltzer compliments of Wisconsin Distributors. This complimentary beverage will be available on the Boathouse Deck from 10:30 a.m. – noon.

The Market Café and Icehouse at the Edgewater

The Market Café on the 7th floor and the Icehouse on the 5th floor will be open for coffee and grab-n-go breakfast starting at 7 a.m.


If you would like to learn more about sponsorship opportunities, email our Development Director Alex Vitanye at alex@cleanlakesalliance.org.


Is there parking available? Participants may pay to park at The Edgewater parking ramp. The ramp fills up quickly, so plan to arrive with plenty of time before the run/walk begins. You may also find street parking or use City of Madison parking ramps.

When can I check in or pick up my race packet? Participant check-in and registration the day of the event will begin at 8 a.m. on LEVEL 5 of The Edgewater. The run/walk will begin promptly at 10 a.m. on Lake Mendota. 

What shoes should I wear? Participants are encouraged to choose their preferred footwear with weather, ice, and snow conditions in mind. Past runners and walkers have worn spikes, boots, snowshoes, and regular running/tennis shoes.

What is the course like? The 5K course begins off the end of The Edgewater’s pier. Runners and walkers will head out toward Picnic Point, past the Memorial Union, before looping back and finishing at The Edgewater.

Where can I leave personal items during the 5K? We strongly encourage you to only bring items you will use while walking or running. Any bags or gear left at The Edgewater or on Lake Mendota will not be locked or supervised. We are not responsible for lost or stolen items.

What happens if ice conditions are unsafe? Clean Lakes Alliance will make every effort to hold this event, while keeping safety in mind for all competitors. If conditions are deemed unsafe, the event may be cancelled or moved to an alternate location, with entrance fees being considered a tax-deductible donation to support our lakes. Participants will be notified of any changes ahead of the event.

What is the refund policy? Registrations are transferrable if you become unable to attend. In the event the Frozen Assets 5k Run/Walk needs to be canceled for weather, ice conditions, or any other circumstance, registrants can request a full refund for the price of the participation fee, excluding eventbrite fees.


Frozen Assets parachuter 2022

Thank you for supporting our lakes at the Frozen Assets Festival

We had so much fun at the Frozen Assets Festival and hope you did too! Whether you participated in person or virtually, we THANK YOU for supporting lakes Mendota, Monona, Wingra, Waubesa, and Kegonsa!

Read More


Clean Lakes Alliance kicks off annual Mendota Freeze Contest

On Wednesday, December 1st, 2021, Clean Lakes Alliance kicked off its 10th annual Mendota Freeze Contest. This year, Greater Madison experienced near-normal November temperatures. As of the first of the month, Lake Mendota, and the other four Greater Madison lakes, remained completely open. Despite this week’s mild temperatures, more than 165 years of data show the median freeze date for Lake Mendota is only a little under three weeks away on December 20th.

Read More

2021 FORE! Lakes Golf Outing - Nakoma Golf Club

Greater Madison businesses tee off to raise money for the lakes

A warm temperature and a sunny sky greeted golfers participating in this year’s FORE! Lakes Golf Outing, held for a third year at Nakoma Golf Club. The event was made possible thanks to platinum sponsor, Johnson Financial Group; cart sponsor CG Schmidt; scoreboard sponsors Buye Law Office, Lands’ End, and Weed Man Lawn Care; and a host of hole and green sponsors.

Read More

Lake Mendota looking toward Picnic Point

Ice-on date arrives days after the new year

Air temperatures below the freezing mark throughout the last week, combined with cold water helped Lake Mendota officially freeze on Sunday, January 3rd, 2021, as declared by the Wisconsin State Climatology Office. Lake Mendota, the largest lake in the Yahara Watershed, froze 27 days shy of January 30th – which is the latest date that ice-on has ever been declared (1/30/1932).

Read More

2019 Thankful For

Things we’re thankful for at Clean Lakes Alliance

At Clean Lakes Alliance, we’re thankful to be part of a community that is surrounded by five beautiful lakes. Our Yahara lakes provide ecological diversity, recreational opportunities, economic benefits, and endless beauty to the Greater Madison area, its residents, and guests.

Read More

Lake Mendota Frozen Dec 2018

It’s Official – ICE ON for Lake Mendota!

Ice on date beats median freeze date by five days

Despite warm weather in Madison over the weekend, cool nights, light winds, and cold water helped Lake Mendota officially freeze on Saturday, December 15th. Lake Mendota, the largest lake in the Yahara Watershed, froze eight days after the smallest lake in the watershed, Lake Wingra, which officially froze on December 7th. Lake Monona officially froze on December 11th.

The Wisconsin State Climatology Office requires ice to hold for a period of 24 hours before a lake can officially be declared frozen over. After ice took shape this weekend, staff waited to see whether it would hold out through the warm daytime temperatures. The December 15th freeze date is 12 days ahead of last year’s December 27th freeze date, and a surprising five days ahead of the December 20th median freeze date. The latest freeze date for Lake Mendota was January 30th – which happened in the winter of 1932.

The Wisconsin State Climatology Office makes the official determination as to whether the lake is frozen. The climatologists use the same guidelines they have used for decades to determine whether the lakes are iced over. This allows for a continuity in data collection. Read more: Determining ice cover on Madison’s lakes.

Read More