Challenge Events
Challenge events, fundraising and sponsorship events.
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Courses, training and events
Discover our range of engaging courses, training and events, designed to connect you with nature and enhance your skills.
River Lea Catchment Conference
Join us for the 2026 River Lea Catchment Conference!
Swift Awareness Week Events
Why not celebrate Swift Awareness Week by coming to an event organised by a local Swift Group!
Lesser weever fish
One of the only venomous fish to be found in British waters, the lesser weever fish is certainly one to watch out for!
Water Voles Return to the Upper River Lea After 20-Year Absence
Trust reintroduction sees one of the UK’s most threatened mammals back on the Upper River Lea.
Local hedgehog events raise awareness and funds for wildlife
A partnership project between the Trust and Harpenden-based Hornbeam Wood Hedgehog Sanctuary has raised more than £1,300 for wildlife and helped spread awareness about the risks facing hedgehogs…
River lamprey
The river lamprey is a primitive, jawless fish, with a round, sucker-mouth which it uses to attach to other fish to feed from them. Adults live in the sea and return to freshwater to spawn.
What we do
What we do
Lea Valley Wader Strategy
The Trust and partners are working to address the decline in breeding wading birds in the Lea catchment through a new strategy.
Herts residents invited to join tree planting events at Panshanger Park
Local residents are being encouraged to get digging at a series of tree planting days, as part of Panshanger Park’s contribution to the Queen’s Green Canopy initiative.
River Volunteers
Be a Water Vole Surveyor, River Fly Monitor or help to remove invasive species like Himalayan Balsam from the rivers. We need local people to get involved to keep our rivers in great condition. Volunteer with us.