The pool phase will kick off in October, with a full fixture list to be confirmed in due course.
Head coach Gregor Towsend described the group as “very exciting and very challenging”, and underlined the club’s ambition to surpass their previous efforts in the competition.
Gregor told www.glasgowwarriors.org: “The quality of the teams we’ve been drawn against speaks for itself, but that’s always the case in the Heineken Cup, and we strongly believe we can be competitive in terms of qualifying from the pool.
“Northampton have excellent pedigree in the competition, having won it in 2000 and reached the final as recently as 2011. They will be extremely tough opposition both home and away, but we showed against Bath last season that we can certainly live with the best teams in England.
“Ulster we know very well from the RaboDirect PRO12, and they’re another skilful, tenacious outfit. They underlined their class in the 2011/12 Heineken Cup, and will no doubt be looking to go one better and lift the silverware this time.
“Castres also have considerable experience of this competition, and you only have to look at how they’ve done in the Top 14, reaching the semi-finals, to appreciate that they’ll mean business.
“We know that we’re going to have to perform to our absolute best in all our pool fixtures to achieve our aim, but we believe in our collective ability and are more than up for the challenge.”
Pool One - Munster, Edinburgh, Saracens, Racing Metro 92
Pool Two - Toulouse, Leicester, Ospreys, Benetton Treviso
Pool Three - Biarritz, Harlequins, Connacht, Zebre
Pool Four - Northampton Saints, Ulster, Glasgow Warriors, Castres
Pool Five - Leinster, Clermont Auvergne, Scarlets, Exeter
Pool Six - Cardiff Blues, Toulon, Sale, Montpellier