2.1 Miles One-Way to Wilson Meadows Trail #512
6.1 Miles One-Way to Cross Mountain Trail #637
8.3 Miles One-Way to Wilson Peak Offshoot With Another 2.2 Additional Miles to the Peak
10.6 Miles One-Way to Morningstar Trail #420
12.2 Miles One-Way to Wilson Mesa Trail #421

The Lizard Head #505 Trail is a pretty popular trail that has its trailhead on the San Juan Skyway at the Lizard Head Pass rest area and interpretive site. The trail takes you to any one of the above mentioned trails and peaks. It is an incredibly beautiful but challenging trail. The trail begins around 9,000 feet but it reaches heights over 12,000 feet. The trail is 12.2 miles from start to junction with Wilson Mesa Trail #421 which itself is 4.8 miles one-way to that trailhead off Forest Road 622. You are able to access Cross Mountains, Sunshine Mountain, Lizard Head, and Wilson Peak. There are three 14ers in the area although Mount Wilson is apparently one of the toughest ones to climb in Colorado and it needs alpine expertise and climbing gear.
The trail heads immediately northeast for about a mile and a half through a meadow with gorgeous mountain views and pine and aspen alpine forests.

You then spend the next .6 miles or so ascending grueling switchbacks through the forests but thankfully there are many a spot to see the sprawling mountains to the east and beautiful Trout Lake below you. Some of the peaks include Sheep Mountain, San Miguel Peak, Beattie Peak, Fuller Peak, Vermilion Peak, Golden Horn, Pilot Knob, Grant Peak, South Lookout Peak, and the Yellow Mountains.
During this ascent you climb 1,800 feet and it is the toughest part of the entire trail (unless you climb Wilson or some other peak).

My wife and I only made it the 2.1 miles up to the Wilson Meadows Trail Offshoot on account of time but we will return to head to the meadows and to check out the many incredible views that you’re afforded a little ways up.