Burnmoor gained a vital 12th win, which gave them the title for the third time in six years.
Unbeaten throughout the season they headed Whitburn, who have chased them from the start but have to be satisfied with second place.
Burnmoor knew victory would give them the championship they last won in 2004 and they made no mistake.
They beat Boldon by nine wickets after dismissing them for a meagre 60 runs with Ian Conn (three for 11), Martin Thursfield (three for 22) and Gary Brown (two for two) proving a formidable trio. Brett Pelser (41 not out) then made sure the champagne was uncorked after just 14 overs.
Whitburn made a real effort to cash in on any Burnmoor slip-up. But they finished four points adrift, despite another impressive display against Marsden.
Jimmy Daley (86) and Neil Ayre (85) shared in a polished opening stand, which took them to 201 for five before Neil Johnson (four for 61) and Paul Cook (three for 10) saw off Marsden for 132. Young Martin Fearon (46 and three for 47) looked a star in the making for the losers.
Hetton Lyons achieved their aim of finishing third when they beat Philadelphia by six wickets. Paul Riddle (50) set up the victory after Stewart Walker (four for 23) and Gary Adey (three for 40) restricted Phili to 171.
Seaham Harbour ended with the wooden spoon after a long battle with Felling. They were separated by the two extra points Felling gained in their draw with Durham City.
Seaham, who drew at Eppleton, made 170 for eight in response to their visitors' 228 for three in which David Tate (80) and Liam Mallaburn (67 not out) showed great form.
Simon Brown (89 not out) never allowed Guyan Sirisoma (four for 25) to get completely on top, although Harbour just didn't get enough points to move off the foot of the table.
South Hetton's Ashok Patel bowed out of league cricket with four wickets and 39 runs against Horden, which was another drawn match.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules hereComments are closed on this article