The White Domes Loop is a great short hike inside Valley of Fire State Park. Loops are nice because you don't have to backtrack. On the flip side, you have to carry the doggie poop bag the rest of the way instead of being able to leave it and pick up on the way back.
The highlight of the hike is this narrows section. It's a cool shaded spot that's perfect for a break. It's also great for a quick photoshoot. Bawoo is such an awesome hiking dog.
Here is my everytrail trip posting.