Managed by the Northern Ireland Environment Agency, this is the first time the award has been won in the North West.
The park is located between L'Derry and Dungiven.
Environment Minister Mark H Durkan said: "This National award is a sign to visitors that the park boasts the highest possible standards, is beautifully maintained and has excellent facilities.
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"This is particularly good news as it is the first time this award has been secured in the North West.
"Huge credit must go to my NIEA officials who manage the park and for the essential work they do in maintaining this and other facilities to such a high standard for the benefit of not only current but future generations."
(CD/JP)
