Finish WINTER BAY Backyard Ultra
Start WINTER BAY Backyard Ultra
Happy runner in WINTER BAY Backyard Ultra
WINTER BAY Backyard Ultra night time
We support Barndiabetesfonden 2024 #Run4Diabetes
Event area WINTER BAY Backyard Ultra
Finish WINTER BAY Backyard Ultra
Loop area in WINTER BAY Backyard Ultra at night
Start of WINTER BAY Backyard Ultra

ONE. MORE. LOOP. #Run4Diabetes!


Welcome to the 4th edition of WINTER BAY Backyard Ultra - the race in the middle of central Stockholm - with start/finish right at Liljeholmen's subway!

The 1st edition in May-2022 was won by Mai Bui in 41 laps, which also gave her a Silver Ticket (place in Sweden's national team for the WC in Backyard Ultra.

The 2nd edition in May-2023 was won by Szilard Fodor from Hungary in 30 laps.

The 3rd edition in May-2024 was won by Rasmus Stenemo on 39 laps, who also claimed a Silver Ticket.

We get a lot of praise for the incredibly nice, varied course, which runs beautifully along Lake Trekanten, round the magnificent Vinterviken & back again on the other side of the lake to Trekantsparken.

Everything related to the race will contribute to our charity initiative #Run4Diabetes in support of The Swedish Child Diabetes Foundation.

Through WINTER BAY Backyard Ultra 2024, we raised a whopping 53.543 SEK!

WELCOME to the running festival!!!


Event:                WINTER BAY Backyard Ultra

Date:                  May 3, 2025

Start Time:        10:00 am

Location:           Liljeholmen - Stockholm

Distance:           6.7 km / loop

Entry Fee:          €85


- Contribution to #Run4Diabetes charity (20% of entry fee)

- Participation in a really inspiring WINTER BAY Backyard Ultra

- Loaded aid station with water, sports drink & food/snacks

- Race Bib with name (after April 15, bib without name)

- Race Photos

- A unique WINTER BAY Backyard Ultra medal for all participants (who didn't say no at registration)

- A unique WINTER BAY Backyard Ultra give-away (TBD)

- A WINTER BAY Backyard Ultra Goodie Bag from our sponsors

- Hugs & High Fives

- Fantastic prizes to the winner + best male/female (assist)

- Great offers + lottery prizes from our sponsors/partners


- The starting line (& finish line) is located at the small but beautiful Trekantsparken, just 100 meters from the exit of T-bana Liljeholmen. Also called the "Loop Area".

- The 1st kilometer will follow the south side of lake Trekanten on prepared trails with sections of wooden paths.

- The 2nd kilometer will take you through the beauiful Vintervikens Trädgård on gravel/macadam/asphalt paths.

- The 3rd kilometer (almost) you will be running on asphalt paths leading up to the top of Örnberget, where you will face the only steep uphill on the course. Feel free to walk.

- Kilometer 4-5 (almost) starts with a rather heavy descent down to the water, where you will follow Vinterviken (Winter Bay) along lake Mälaren on prepared trails.

- Kilometer 6 (almost) will take you through the residential area of Gröndal along Gröndalsvägen on asphalt pavements.

- The last kilometer (almost) will follow the north side of lake Trekanten, before you reach the loop area & the finish line for each loop.

- ... Then you run & repeat this loop under 1h, until there is just one competitor willing to run one more loop under 1h. Remember, the next loop is always cooler than the previous!


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