On Sunday 26th April 2026, John Krause will run his 235th marathon at the London Marathon in support of stem4, the teenage mental health charity.

stem4 is a UK charity dedicated to improving teenage mental health through early intervention, education and free digital resources. Founded by Consultant Clinical Psychologist Dr Nihara Krause MBE, it provides evidence-based support for young people, families and professionals.

Its award-winning apps, including Calm Harm, Clear Fear, Move Mood, Combined Minds and Worth Warrior, offer practical tools to help young people manage self-harm urges, anxiety, low mood and self-worth. Find out more: www.stem4.org.uk

As John says:

“Knowing that every step I take can help a young person through a difficult time keeps me going.”

Your support can make a real difference. Please consider donating and helping stem4 continue its life-changing work, whilst commending John’s magnificent effort.