In addition, Glasgow Hawks stand-off Duncan Weir - a member of Scottish Rugby's Area Institute Supported National Academy - has earned his first full professional contract.
Warriors head coach Sean Lineen said of 31-times capped Hall: "I think Dougie is a quality player. He is a real perfectionist and that rubs off on the rest of the team.
"He tackles well and has so much experience. At this stage of his career, to sign again for Glasgow, just shows you what we're about."
Hall replied: "We have the players and the desire at Glasgow to win the Magners League and it's something that I want to achieve in my time here.
"Not only do I feel we have the ability to achieve success this season, but with the other players that have committed to the club, I feel we can continue to achieve in the years to come."
On Forrester, Lineen continued: "Calum is young, he's hungry and there's an edge to his game.
"He is one of the unsung heroes of this Glasgow squad because he's in there behind the Killer B's (Kelly Brown, John Barclay and Johnnie Beattie). When he gets a good run of games, he can be something special, but unfortunately he's had a few injuries over the last couple of years.
"Calum's also really important to the spirit of the team because you can see that he wants to do well for Glasgow. I'm really excited with the back-row talent we've got."
Speaking about Weir, Lineen added: "We've been watching Duncan for a while now. He is a talented youngster with an outstanding kicking game. I really like his attitude and I'm looking forward to working with him."
The signing of Weir follows on from the acquisition of Heriot's flanker Chris Fusaro and Warriors chief executive, Kenny Baillie, today expressed his delight at seeing yet more young Scottish talent emerging from the Scottish club scene.
"I strongly believe there are a lot of very good rugby players within the club game in Scotland, and in Chris and Duncan, the Warriors are fortunate to have secured the signatures of two of the most promising young players to come out of the club game for many years," Baillie said.
"At the same time, this is an excellent club for them to join as the attention to detail of all the coaches and support staff is off the highest standard and the boys will receive the very best in coaching and player welfare.
"Along with all the Warriors fans, I am excited about watching both players play in and win matches for the club in the years to come."
Glasgow squad update (as at 10 March 2010)
INS - Chris Fusaro (Heriot's & National Academy), Duncan Weir (Glasgow Hawks & National Academy)
RE-SIGNED - John Barclay, Calum Forrester, Richie Gray, Dougie Hall, Ruaridh Jackson, Alastair Kellock, Moray Low, Dave McCall, Bernardo Stortoni, Jon Welsh
OUTS (at the end of season 2009/10) - Kelly Brown (Saracens), Mark McMillan (Bath), Dan Parks (Cardiff Blues)
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