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Outdoor Swimmer Climategames 2025 League – Leaderboard

How you helped plant 930 trees by swimming

Each year, we run a swimming training league with Climategames – an organisation that helps people turn their exercise into environmental action, such as planting trees and removing plastic from the ocean.

It works as follows:

  1. We set up swimming challenges on the Climategames platform
  2. You download the Climategames app, set up an account and join one (or more) or our challenges
  3. Climategames commits to arranging the relevant climate action

In addition to our annual swimming league, we also organise monthly challenges. It’s free to join, and your swims are logged automatically if you connect your training watch. Otherwise, you can add your swims manually.

We had 93 participants in our 2025 league, resulting in the equivalent of planting 930 trees through Earthlungs Mangrove Restoration. In 2025, as of 22 December, participants had covered a total of 11,940km (something like swimming from London to Buenos Aires) and had swum for a combined 4839 hours.

Megan Barker topped the league with 842km and looks unlikely to be caught at this stage – Congratulations Megan! See below for the top 24 swimmers by distance.

Join the 2026 league

In 2026, we’re supporting the ReSea Project with our annual league.

Find out more and sign up here: https://links.climategames.com/3iwp7VAQkZb

Also, in January, we’re suggesting a Swim-Walk Challenge. See: https://links.climategames.com/SOS1PZwRkZb

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I started Outdoor Swimmer in 2011 (initially as H2Open Magazine) as an outlet for my passion for swimming outdoors. I've been a swimmer and outdoor swimmer for as long as I remember. Swimming has made a huge difference to my life and I want to share its joys and benefits with as many people as possible. I am also the author of Swim Wild & Free: A Practical Guide to Swimming Outdoors 365 a Year, I provide one-to-one support to swimmers through Swim Mentoring and I'm the creator of the Renaissance Swimmer project.