Gabriel's Spring Saskatchewan, Canada

North of Saskatoon toward Blaine Lake on Hiway 12 You will find a turnoff after you have crossed the Petrofka bridge at he beginning of the right bend on the highway. Turn left and continue on a gravel road until you reach what appears to have been or is still a camping area. There is also a circular gravel road around the campsite. You will see an opening on the left. The spring is about 20' in front.

Spring can be found in the picnic area near Petrofka, which is 63 km north from Saskatoon Costco. Continue 2 km north from the highway 12 bridge crossing the north Saskatchewan River. Turn left on 781 and then immediately go into the picnic area. Stay left at the first Y and second Y on the road. The parking area is 50m after the second Y. Continue on the trail for about 10m and you'll see it.
It is a large PVC tube with high flow rates. In just 10 seconds, it can fill a 5 Gallon jug. You should wear pants and a jacket in the summer because there are tons of mosquitos. You can keep feet dry, but it's hard. I only wear flip-flops.
Sign indicates to boil for liability purposes. I have been drinking it for six months. I was introduced to a man who has been using it for 20+ years. He just put it through a charcoal filter.
When I get a chance, I'll add photos.
(I found this information in the comments below Gabriel's spring. The drive is also captured on video.

ENJOY!