Trip to Powell, WY

Once in Lander, you want to get back on Hwy 789 and go East/Northeast and take that to Riverton.

In Riverton, you are going to stay on Hwy 789 heading North/Northeast until you get to Shoshoni. Hwy 789 heading toward Shoshoni also may be called Hwy 26. But don't take Hwy 26 West. That will take you to the Grand Teton's.

Once in Shoshoni, you want to stay on Hwy 789 and head toward Thermopolis.