Here in Jasper National Park, Cavell Meadows is a beautiful area with subalpine and alpine meadows, and the trail usually opens in early July. You'll also see hoary marmots and pika when hiking that trail. Mid-July to mid-August is when the wildflowers peak at higher elevations, but there will be plenty later. One of the most stunning things about Cavell Meadows when they are in full bloom is the drifts of heather everywhere, in all three colours... white, pink and cream.
The meadows up in the Bald Hills also have flowers and great scenery, as does the Opal Hills meadows and the ridge above (for alpine flowers). The Wilcox Pass and Parker Ridge trails also give you great opportunities to hike in the subalpine and the alpine and see stunning views and lots of flower.
Also, in Banff National Park, at the Bow Summit/Peyto Lake viewpoint, take the short hike to the Bow Summit look-out, where a fire tower used to stand. You get into the alpine very quickly and there will be tons of flowers blooming along the edge of the old fire road that you hike on.
Late June and early July is a great time for wildflowers in the montane (lower elevation) areas too, although unfortunately, you are going to miss the calypso orchids that are in full bloom right now.
If you are going through Revelstoke on your way to Golden, you might want to drive the "Meadows in the Sky" parkway in Mt. Revelstoke National Park. I have never done it (yet), but it is reputed to have amazing views and wildflowers.Edited: 08 June 2014, 17:06
Thank you very much for all these advice. I appreciate very much
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