About the event

**Please be aware this is a third party event and is being run and managed by the Cassiobury Park , not the Herts and Middlesex Wildlife Trust. Please contact Cassiobury Park for the most up to date information**

Free talk and demonstration of riverfly monitoring on the River Gade at Cassiobury Park. Find out more about this citizen science initiative that contributes to scientific data on the health of our chalk stream river. A fantastic opportunity to get involved in riverfly monitoring, also learn more and see what lives in the River Gade. 

For further details and to book your place: email cassiobury@watford.gov.uk

Aimed at adults, but families with older children welcomed. Please email to find out more.

Herts Rivers Week 2026 is a county-wide celebration of our chalk rivers through events and activities for all ages. It is also a call to action designed to help people understand the value of chalk rivers - and the role we all play in protecting them.