Note from July 2019: It seems that through the Half-Dome Village, the national park has put up some residences for employees that forces you off the old route for a bit, but the road and bike path parallel super close to the original trail in these places so no worries.
This is a tough route for navigation. Get an early (first light of dawn) start to avoid mowing over hordes of tourists, one less thing to distract. For the most part you want to avoid getting pulled on to the road or new bike path at any point (other than to the aforementioned places near Half-Dome Village
First OMG, don’t underestimate this experience it is surreal. You have World-Freaking-Class Views every where you look...waterfalls, river, creek crossings, and insane granite monoliths!!!
Second: Hey, I recorded a video of this one! I will submit it soon!
Third, the trail is a mixture of non-tech fast and cobbled granite that exercises your footwork, with enough up and down to keep it interesting for sure...and some weaving through massive boulders that put a smile on my face.
I think, and would like to see, a true crusher put down sub-6 min pace on this!