If you don't have a chance to make it out to Banff, (or even if you do!) another great way to enjoy the natural beauty of the area is to rent a canoe at the Glenmore Resevoir and head out along the river. My favourite canoe trek is to head west towards Cochrane. Make sure to pack a lunch and some snacks. There will be ideal spots along the way for a nice (romantic!) picnic. Enjoy!!
To see some pictures of the reservoir, check out:
p.s. If you'd rather take in the view while floating and not 'paddling', another option is to rent a raft at Bowness River and lounge along the area there. This website offers information on the amenities and how to get there.
In the summer Bowness Park located in NW Calgary offers a multitude of things to do. The park offers a spray pool for the kids to cool off, mini golf, picnic areas, bbq pits and both canoes and paddle boats to rent.
It's $15/hr per canoe and $20/hr per 2-person paddle boat. The man made lake has a fountain in the center and a number of off-shoot streams to paddle on.