I did the southern loop of the tour de calgary on Monday. It is a really nice bike ride essentially all on bike path. 60k after riding to fish creek park to start. With the late sunsets it was a real nice after putting the kids to bed bike ride. I left my house at 7:30 and got back just after 10:00 and it was still light out. Official sunset was 9:53 but it is light enough to bike until about 10:15. After about 8:30 the pathways really empty out so you can cruise pretty good.
Below is a link to the route.
http://www.bikely.com/maps/bike-path...e-Calgary-100K