Is this part of the Canadian Selkirks?
Yes about 4 hours west of Calgary.
This is the southern section of the Canadian Selkirks right around Rogers Pass, a truly amazing place.
I don't see a page for this beauty, whats the ascent like? and the height?
Height has little to do with these mountains I live 45 mins from this mountain but height has little to do with this range(I think the highest in the Selkirks is under 12,000ft. The standard route up Sir Donald is III 5.4. Here is the page.