Join us for the Frozen Assets 5K, America’s only 5K on a frozen lake!

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


Your registration to the Frozen Assets 5K includes admission to the race with optional chip timing. Online registration closes Wednesday, January 20th. The registration pricing schedule is below: November 1 $35 :: Early bird December 31 $40 :: Regular price February 2 $45 :: Same day Best of all, your registration supports work to protect and improve water quality in our lakes!


The event is chip-timed for runners, sign up for the walk pass for an untimed event. Awards will be given to the top three male and female finishers.

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.


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 cancelled or moved to an alternate location. Participants will be notified of any changes ahead of the event.


Is there parking available? Event parking will be available at The Edgewater for $5. Participants may also find street parking or use other City of Madison parking ramps. What is the course? The course is a loop on Lake Mendota to Picnic Point and back. When can I check-in or pick up my bag? Participant check-in and registration the day of the event will begin at 9 a.m. An optional bag pickup will be held on Thursday, Jaunary 31st from 4-8 p.m. 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 and non-refundable. Thank you in advance for your donation to support our lakes!

Leaf Management

Trees are good, right?

Statewide phosphorus reduction credits for leaf collection

Urban trees provide many benefits to our communities. They help us save energy, reduce noise, and improve air quality. Trees are aesthetically pleasing, can increase property value, and provide natural homes for insects, birds, and other wildlife. Trees are also an important part of the earth’s water cycle. Transpiration from plants and trees is released into the atmosphere, and later becomes precipitation. The rain and snow return valuable moisture to our crops and forests, and the cycle continues. However, trees can cause problems for our lakes if the leaves that fall from them each autumn are not regularly removed from streets and parking lots. When leaves collect on streets, they create a phosphorus-rich “tea” whenever it rains. The rain water passes through the leaf litter, and allows phosphorus to drain from the leaves. The leaf tea washes into storm drains and flows directly into our lakes, causing water quality to deteriorate.
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Action Alert

Will you help us advocate for our lakes?

We need your help!

At our Yahara Lakes 101 presentation, on Wednesday, October 10th, we heard from Dane County Executive Joe Parisi about the proposed 2019 budget and how it will address flooding concerns and lake health. The Dane County Board is holding a budget hearing on Wednesday, October 17th. There are many initiatives in the budget that will help our lakes, and they need YOUR support! Please advocate for our lakes in the following two ways:
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Friends of Clean Lakes sign at Shoreline Swim

A busy summer for our lakes

Summer in Madison would not be the same without our lakes. This year, especially, we’ve seen our lakes at their best and their worst due to record rain events, cyanobacteria blooms, and beach closures. Here at Clean Lakes Alliance, the summer is a time to get out and enjoy our lakes while also doubling down on our efforts to protect them. From innovative grant projects, to county policy recommendations, to record-setting engagement, we’ve been hard at work for our lakes this summer, and so have you! Let’s take a look back at some highlights from this lake season.
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You care about our lakes and want to get involved…we’re here to help! For the person who really wants to dive in and make a difference, join us at one of our Clean Lakes Alliance Introduction Breakfasts. Hear from staff at Clean Lakes Alliance about our current projects and how you can get involved in efforts to protect our lakes. Sign Up To join us at an Intro Breakfast, please email with the date of the event you would like to attend. Feel free to bring 2-3 colleagues, neighbors, or anyone else who cares about our lakes! Event Schedule 7:45 a.m. Networking, coffee, and pastries 7:50 a.m. Program begins, with Q&A and discussion 8:45 a.m. Event concludes  

During Clean Lakes Alliance’s 3rd annual Frozen Assets Festival, WKOW 27 came down to Lake Mendota to check out the event and chat with Adam Sodersten, the Director of Marketing of Development. Here is an excerpt from the interview: “A lot of cities have these big huge green spaces in the middle of the city; Central Park in New York, Boston Commons, well when winter comes [the lake] becomes our Central Park. It’s really such an exciting thing for us to have here in Madison and to be able to have all of these really fun winter activities is just a really great opportunity.” Check out the rest of the coverage at!