Yost Creek Trail to Yost Lake is a 4.6 mile out and back trail located near Lee Vining, CA that features beautiful wild flowers and is rated as moderate. The trail is primarily used for hiking, trail running, and mountain biking and is accessible from June until October. Dogs are also able to use this trail.
I've done this trail a few times. It's pretty much full uphill, but the waterfall halfway up and the lake at the top make it worth it. I e always gone in the summer months and that lake sure feels good when you make it there.
I started between Gull and Silver lakes. There is parking at the trailhead. You have to watch for the signs and the road takes you a short distance through the woods to the trailhead.
Started along the June Lake Loop Trail, and given that mom is pregnant and dad was wearing a toddler on his back we only made it partially up the VERY steep trail, but you are quickly rewarded with breathtaking views of June and Gull Lakes. Can't wait to do the whole June/Yost/Fern trail loop next year.
If you look at the map you will see two legs of the Yost Creek trail. One legs comes off Hwy 158 between Gull Lake and Silver Lake near Double Eagle resort. There is no parking at that trailhead, it's VERY steep and yes there's a log to cross over a waterfall.
The other leg, the one I recommend, starts on the map as the "June Lake Loop Trail" across the street from the fire station near the town of June Lake and the June Lake campground. It's longer but more gradual and cuts across the June Lake ski resort.
You'll notice on the map there appears to be a trail going south by southeast from Yost Lake then cutting east by northeast down Glass Creek. That trail is not marked, I have not hiked through, but if you take a map and a compass you might find your way to the awesome Glass Creek / Obsidian Dome area.
I have included a link that shows the firestation and the trailhead across the street. https://goo.gl/maps/jXSZe
Do not bring a dog! There is a very narrow log for crossing a strong currented river.