Getting there: From Aspen, drive .5 miles west on Highway 82 and turn left onto Maroon Creek Road. Keep right and continue 9.5 miles to the Maroon Lake parking Area. There is a fee to enter the park area. Be advised that Maroon Creek Road is restricted to vehicles from 9 a.m. to 5 p.m., so you'll need to take the shuttle from Aspen Highlands Ski Area, which leaves every 20 minutes.
While this gem of a hike is open only through the end of September, it's worth the trip (and the insane crowds). The Maroon Peak Trail offers everything Colorado is known for in one go: Snow-capped mountains, mountain lakes, pine forests and bright yellow and red fall foliage. Give yourself an entire day to explore this 11-mile long trail as it winds around Maroon Lake (there is a shorter, 1.5-mile long trail that heads directly from the parking area, around the loop and back) and along the Maroon Bells-Snowmass Wilderness.