Chak-Rood (Chak means cut and Rood means river) is a deep canyon with (almost) warm watter. It's Y shape in plan. one branch is major and the other is minor. This trip is in minor branch. It has 4 watterfalls wich one of them (I think the last one) is great.
Here is my GPSr Tracklog. It will tell you everything about how to get there and time scheduling ... ;)