Hiked this with my twelve year old daughter and it wasn't too tough. There is a nice trail until you reach a large upright tree. From there you have to climb two pretty steep ridges to get to the top. The last mile and a half are in loose rock with not much of a trail. But when you get to the top the view and the drop off are amazing. On one of the peaks nearby there is a bristle cone grove and some views of the cliff face that are well worth your time.
A V. on Notch Peak
Notch Peak is a fairly easy hike with a steady climb until the saddle below the peak. Be sure to check out the Bristlecone Pines on the back side of the peak to the right of the saddle. The final ascent to the peak is steeper than the canyon portion at the beginning of the hike. I've read that on a clear day, you can see Great Basin National Park, the Salt Flats, and the Wasatch Mountains from the peak, but it was pretty hazy the day I went. The hike is well worth the effort and the drive, but due to the dropoffs, it's probably not a good one for small kids.