From the scenic road, keep an eye out for the Grand Wash sign, where you'll turn to reach the trailhead. Take the Grand Wash road as it turns into a dirt road and continues to the northeast. A sign posted at the turn warns visitors not to enter if storms are forecast, and it is important to take this warning seriously. Visitors will follow the dirt road for about 3/4 mile until a parking lot is reached. There is a pit toilet at the parking lot.
The trailhead is located at the north end of the lot with plenty of signage. Follow the trail until it splits (Cassidy Arch
to the left, Grand Wash to the right). The Wash is mostly gravel and sand and continues northeast until reaching Highway 24. The route gently descends for most of the journey out, though at 1.5 miles, you'll notice a short and very steep portion. The trail mellows again almost immediately.
About a mile into the trail you enter the slot canyon (the Narrows) which offers stunning walls on each side.