Hey Duk. I'm in the north end of town, and there's a great hike up here. You want to go down to the Valley Ridge golf course, and find a 'creative' way to get to the river. Then head upstream to the Bearspaw dam and beyond.
It's an excellent hike, and you'll probably see lots of deer. They had a black bear they were trying to trap out of there a couple of years back, and I've run into cougars twice in there over the years.
There's lots of trails to explore, steep hills to climb, some pretty funky looking rock outcrops that I keep meaning to rope in on, and plenty of HUGE 500 year old Douglas Fir trees. Pretty cool stuff.
Also, if ya want to take a bit of a road trip, head out toward the Sibbald gun ranges. Stay on the main road past the turnoff, and take your second left a short time later once you get past the wetland. You will be on the 'Jumpingpound Demonstration Forest' road. Down there a way, there is a marked trailhead with outhouses and a small parking lot. Head in there.
You'll go down a big hill to a bridge put in over the creek (FANTASTIC little fishing hole there with lots of nice trout, so bring a rod if ya want). The trail is a 4km loop through some really old spruce that are at least 120' high. We cleared the trail last spring after a winter storm.
When you cross the bridge, stay right. About ten minutes later (before you start up the hill), watch for a double-stemmed spruce tree about 30 yards off the path to your right. It is a true giant that is easily twice the size of any other I've ever seen. The base is 6'!
Anyway, if I think of any other favourites, I'll post 'em. Good luck, and hopefully the weather doesn't suck as bad as if has all week.
Tree
Calgary area hikes?
I went for a bit of a stroll today in the rain with my pack on, doesn't that count for something? 
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