Alberta, NWT, Manitoba, and Montana are 'near Saskatchewan', but that's probably an overly large area for your purposes. Southern BC, Ontario, and I presume Quebec are warm enough climates that herps [specifically reptiles and turtles] can be common. On the prairies, the climate is so hit and miss that the scaled herps and some of the frogs are very fussy about exactly where they live. They might occur hundreds of miles north of the USA border, but only in very specific microhabitats that provide their minimum requirements. Conversely, you don't have to get very far into the USA [or the warmer provinces] for at least some species of reptile and turtle to become obvious and abundant.
I can't give you precise locations, although some can be obtained if you do some online digging for specific species. I CAN suggest that sandy soils near Brandon MB, and coulees or river valleys in southern SK and AB, especially Grasslands National Park, and areas on or south of the Cypress Hills. Turtles tend to like calm warm waters; snakes often like some bare ground near shrubs and rocks and often south or southwest-facing slopes to provide the best heat exposure. The lizards prefer open and sandy ground. The salamanders can be almost anywhere, but are secretive except at night when it's raining. Frogs, by and large, are easy to find in Canada, but the prairie specialists need sandy soils and the right weather to be found.