The work of volunteers has seen Historic England remove 24 Lake District sites off its at-risk register.
The team of 60 people have given their own time to protect and conserve buildings, wrecks and ruins.
The Lake District Archaeology Volunteers Network was set up in 2012 and has spent most of its time destroying bracken - the plant's roots can damage important remains.
Archaeology and Heritage Assistant for the Lake District National Park, Holly Beavitt-Pike, said: "This is fantastic news for the Lake District and a testament to our volunteers. Not only does it demonstrate the cultural heritage of this special landscape but it also shows how, through hard work, we can protect the historic environment."