“where warm waters halt”
Somewhere in Yellowstone
This seems to be the most important clue by virtue of being first. If you get this wrong, your journey might leave you in the cold, but your effort will still be worth the pictures, fun, and memories.
Lots of possibilities. Just check out the other Thrill of the Chase blogs. My thoughts immediately landed on the geysers and hot springs in Yellowstone Park. Once I got the map out, I saw how numerous those hot spots were. And then, there was all the chatter about the Firehole, not something I’d ever heard of.
If you go with hot springs, you soon realize they are found in several other Rocky Mountain states. And you’ll probably find canyons next to most of them……
Then, if you take “halt” to the dictionary, you’ll find a few other meanings. Check it out. This can lead you to places away from water.
If you dive into some history books, you might find an utterly unique idea for “where warm waters halt”ed. I did.
Happy hunting!
The Fenn Diagrams 
But you might tell me where warm waters halt ?
There are a lot of “hot springs” in the Rockies, but I only found one “warm springs”, which is actually very close by Santa Fe, in the Jemez Mtns. I hiked in to the Mcauley Warm Water Springs in June 2017. That is a steep 5 mile round trip hike but is rewarded with soaking in the warm springs water. I looked around the area fairly well but did not come up with the chest.While I was soaking in the water I turned around just in time to see a red racer snake swimming very fast across the pool to some tall grass on the side.
Still trying,
Carl
San Diego California
Boiling River
Boiling is not warm. It’s hot. He didn’t say where hot waters halt.
Stunning!
Beautiful photos. Have visited many hot springs in the Rockies, all are worth the trip
Where warm waters halt would be cold water – Agua Frio?
Where warm- sunshine
Waters halt. – Reservoir
Sunshine reservoir Wyoming