I approached Fuego Mountain from the town of Chiloquin, which is just off of Highway 97 north of Klamath Falls. From Chiloquin, locate the main road leaving town eastward along the Sprague River. This is road 58 and is a nice paved two lane road. Stay on this road for about 15 miles to the small community of Lone Pine.
In Lone Pine take a wide gravel road cutting back to the left (it is about a left and a half turn) and this is road 852. You are only on this road for about 500 feet and then turn right on an equally good road numbered 44. Stay on 44 as it climbs and winds up into the mountains for about 13.5 miles. At this point turn left on a lesser road numbered 4450 and head north towards Fuego Mountain.
Road 4450 is good for about 2.0 miles and then deteriorates. I continued another .2 mile where the road was steep and crossed over several large boulders in the roadway. I stopped, backed up and pulled off into the forest. I decided this was a good place for my trailhead, elevation 5,880 ft. This poor road continued another .3 mile before I would have had to park anyway.
From where I stopped and started hiking northwest along the road, I followed the road up to a small saddle at about 6,100 ft. The road continues northwest, but took a turn to the right on an old overgrown logging road. Actually there are 2 roads about 200 ft apart that go to the right and you can take either one of them. They soon meet up and head northeast for quite a ways before it switchbacks to the left. This whole road is overgrown with Manzanita bushes but it is easy to follow the road and make your way along.
Eventually you reach a saddle near the 6545 point on the topo. My choices here were to continue on the road or climb the south ridge of Fuego Mountain. I chose to climb the south ridge and later I discovered that this was a good decision. The climb up to the south was only about 300 ft, but it was steep and there were brush areas to avoid. Once on top of the ridge, it was a process of route finding to avoid brushy areas and rocky outcroppings. I continued along the ridge until I found a rocky area under a tree and some brush that appeared to be the summit. I found no benchmark or register to sign.
Coming down I thought it would be a good idea to drop down to the road that would take me back to the 6545 saddle. Going down was no big deal, and I thought I was hitting a home run with this idea until I reached the old road. This road was completely overgrown with thick brush. Some of it was 8- 10 ft high and I resorted to climbing back up the mountain a little to bypass some of the worst brush. I stuck it out and eventually got back to the 6545 saddle and then followed the less overgrown road back to my truck.
The total hike covers about 5.22 miles, gains about 1,185 ft in elevation, and took me 2.7 hours.