Taggart and George both won the 2009 events
Lloyd Taggart and Michael George retained their Syd Quirk Memorial Half-Marathon titles in calm and dry conditions on Sunday.
Taggart won the 13.2-mile running title in one hour 13:54 minutes, whilst George claimed the race-walk title in a time of one hour 52:16 minutes.
Taggart told BBC Isle of Man: "The conditions were much better than last year and I was made up to win."
A record number of athletes started and finished the event.
Taggart finished three minutes 23 seconds ahead of Mike Garrett with Stuart Christian less than a minute further back in third.
The quickest woman in the running event was Gail Griffiths in a time of 1:28:41, a time that placed her 13th overall.
Meanwhile, George retained his race walk title with a 10-minute winning margin.
He beat Richard Gerrard by 10 minutes 22 seconds with Andy Green completing the top three.
"It's always nice to win but I was after a much quicker time. I will use the performance as an indicator of where I want to be," he said.
Judith Quane was the quickest lady and seventh overall in a time of 2:14:39.
Result, 7 November
Syd Quirk Memorial Half Marathon
1. Lloyd Taggart 1 hour 13:54 minutes
2. Mike Garrett 1:17:17
3. Stuart Christian 1:18:08
For full running results
Syd Quirk Memorial Half Marathon Walk
1. Michael George 1:52:16
2. Richard Gerrard 2:02:38
3. Andy Green 2:07:19
For full walking results