What kind of fly am I?

This insect looked like a new one for me. Wish I could have taken a closer photo, but it landed on friend, Terry's, arm and I was sitting in the back of the car. Just a very quick shot while I had the chance, in case I was able to ID it sometime.

This was just one of so many things friends, Cathy and Terry, and I, saw during a three-day trip to Waterton Lakes National Park (26, 27 & 28 August 2014). Other things included fantastic scenery, 4 Black Bears (including one that was swimming in the lake), Bison, and Deer (including several that we saw in the village of Waterton, where we stayed the two nights at the clean and friendly Bear Mountain Motel). We also saw Golden-mantled Ground Squirrels, Chipmunks, a few wildflowers, a few different insect species, and a family of Dusky Grouse (apparently uncommon in Waterton Park).

On the last day, before driving back to Calgary, we did a long drive east of Waterton, where we saw several Yellow-bellied Marmots (a first for me!), and, perhaps the highlight of the whole trip, two (maybe three) endangered Burrowing Owls (a first for all three of us!). I even got the chance to see three or four new-to-me old, wooden grain elevators.

Link for information about "halteres" - the tiny, orange "blob" on this insect:

en.wikipedia.org/wiki/Halteres