It is a very hot hike on the lava rocks. There was a lot of cactus flowers and a few rabbits. There is not a trail that is visible for the majority of the hike and you must find the trail posts to follow. The hike was 10 miles to get to the end of the markers. I would recommend starting the trail early and plan on around 4+ hours.
One of my favorite spring hikes! Beautiful desert landscape! Enjoy the spring foliage including lichen, juniper bushes, sage brush, sego lily and prickly pear cactus. This is rattlesnake territory, but the rattlesnakes stand out against lava rock and I have only seen them on warm days. I start hiking here as soon as the snow has melted off the ground in town.
Once the temperatures get above 75 degrees I avoid this one. The lava rock gets hot! The trailhead can be difficult to find, the sign does not reference to the 20 mile, but says soemthing like "Lava trail." The trailhead is almost exactly 20 miles west on Hwy 20 from the intersection of Bellin Road and Hwy 20. There is a picnic area, but no restroom or outhouse or water. The trail follows tall poles. The blue poles take you in a short loop--at the far end of the loop, you can continue on the out and back with the red poles. The poles can be a little bit difficult to see, so avoid trekking back at sunset if you are unfamiliar with the area. However, the sunset is beautiful here with views of some of the buttes in the west and southwest and the Pioneer mountains. Wear sturdy shoes and watch your foot placement--there are plenty of cracks, loose rocks and lots of uneven ground. The vent is pretty cool, but I think this is one hike that the journey is at least as good as the destination.