Is this canyon off the San Juan river downstream from Bluff?
Recapture Wash starts in the Blue or Abajo Mountains NW of Blanding, runs east of Blanding and into the San Juan some miles upstream of Bluff. It’s an unusually long watercourse for the area and varies from a deep canyon to an arroyo running across flat terrain. If I remember correctly, parts of it are trailless and others have jeep or gravel roads through them. But it’s been over 25 years since I’ve been there.
That area of the world (south Utah) is the most beautiful I’ve ever seen. I miss it.