Lake District National Park is in the top five per cent of 3,000 organisations assessed for distinction by Customer Service Excellence (CSE).
On top of the accolade is the recommendation others should learn from a resounding success story.
LDNP's quality manager Neil Solender said it was an achievement to be proud of. He paid tribute to unstinting service by staff and volunteers who helped clinch the sought-after distinction.
He explained: "We provide a huge range of services, from information centres to outdoor events, car parks to catering, sustainable transport to education initiatives and so much more.
"Across the board, what we do and how we do it has been given gold star status and we are delighted by the assessment, but we won't stop here. The challenge is to carry on improving."
Neil explained 57 areas of work were reviewed. In 14, LDNP excelled, putting it among the top five per cent of best customer service in the country.
He said: "What's especially pleasing is CSE's declaration that others could learn from us. And we have already been approached by leading organisations to pick up some tips.
"CSE highlighted our work with the local community, especially in the Ullswater valley. The assessor met residents and saw the diverse range of needs and successful actions. Our customer-focused approach received warm praise.
"We were the first national park to get the award and have continued to receive CSE status ever since. However, this year's announcement that we have scored so highly is a fantastic boost.
"Our aim of putting customers first in all we do is obviously working. We listen to what they are saying and constantly improving the way we operate. Staff and volunteer commitment was highlighted, particularly in environmental and community work."