Grand Park Trail past Lake Eleanor is a 8.2 mile moderately trafficked out and back trail located near Paradise Inn, Washington that features a lake and is rated as moderate. The trail is primarily used for hiking, walking, nature trips, and birding and is best used from July until September.
I took my Scout troop on this hike on a beautiful August weekend in 2012. The trail from Sunrise to Lake Elanor is a relatively long out and back with the return trip uphill the whole way. As discussed in other posts there is a shorter way in. However you miss the majestic views of Mt Rainier's Grand Park if you go that route.