The full trail stretches 5.5 miles from Fairyland Point to Bryce Point, connecting all the major overlooks along the way. You could start from any of these and hike an out-and-back, or you could walk point-to-point and return with the park shuttle bus instead. Though the areas around the overlook parking lots are often crowded, a short walk along Rim Trail can quickly deliver a slice of the panorama all to yourself.

Sources: https://www.nps.gov/brca/planyourvisit/rimtrail.htm https://utah.com/hiking/bryce-canyon-national-park/rim-trail