MULGRAVE finished second on the division 2 ladder while the club's reserves and colts were the minor premiers.
The senior Lions play in the second semi-final against Mitcham next Saturday in a quest to win their first premiership in 29 years.
In the final home-and-away game on Saturday, Mulgrave thrashed North Ringwood by 150 points, 30.18 (198) to 7.6 (48) led by Jarrod Fearon-Brown with six goals.
The reserves continued on their winning way and reversed their first half of the season loss to North Ringwood, which was the only side to defeat them all year, by winning 24.20 (154) to 9.6 (60), with Glenn Hewitt kicking seven goals.
The colts also made amends for their earlier loss to North Ringwood with a 45-point win and head into the finals favoured to take out the flag.
The Lions won 16.12(108) to 8.15(63).