Autumn in Zion NP: pick just about any point along the Virgin River -- from the Watchman to the mouth of the Narrows -- and you're bound to be treated to a landscape dotted with delightful splashes of fall color. But to experience the season's palette at its most spectacular you'll want to go up! You could opt to see it all from Angel's Landing, or just part way up the Wiggles. If you've got the stamina you could hike up to Observation Point for a view that is truly breathtaking (both figuratively and literally.)
But for the elevated view with the quickest access you can't go wrong with the hike up the Kayenta Trail from the Grotto shuttle stop -- in mid to late morning if you want the east side canyon walls bathed in blues and purples, or late afternoon if you want to see the same walls awash with warm pastels, oranges and reds. (In both cases, of course, the foliage along the canyon floor will be a sublime pat work of warm greens, yellows, and burnt oranges.)
I hope these posts are inspiring you to "find your National Park" during this year's centennial celebration of the NPS. And, as always, thanks for letting me share. Cheers!