This is an old railroad track up the hill that has been turned into a 1000+ stair climb.
After the first few hundred fast steps you'll be breathing heavy, but you are probably thinking, this is no problem, maybe I'll do it a couple of times. . . At 300 you'll notice a change and you may start to realize what you have gotten into as the steps become more uneven and your speed will drop. At 500, it gets interesting, especially if you don't like heights. At that point, when the earth is 10 feet below the tracks you are on, it isn't about fitness, it is about balance. (There is a bypass for this part on the right hand side). For about 70 steps, the ground beneath the tracks has been washed away and you are on a railing-less bridge with more gaps than steps. It is also about luck, so that you avoid the out of control or balance challenged people coming back down. Upon finishing that stretch, there is a brief return to normalcy, then, the trail gets steep. The don't look back and definitely don't lean back kind of steep. It is so steep that keen observers will realize that the hard part isn't the climb, it's going to be the descent. By the time you get to 700, you'll think you are at the point of no return and how bad could it be from here? You won't be running, if you do you'll be risking your life and that of the others you take down with you. I recommend all 4s at this point even if you have great balance, it is the safest and fastest. By 900 you'll be questioning the stair counts painted on the rail - I swear it was 110 steps to get to 900 from 800. The final closing sprint won't be much of one as even fit folks are going to be huffing a bit and the steps are wildly inconsistent. At the top, there is a little scramble to the top for a great view, but this is more about the journey, which isn't halfway done. How hard could it be to go back down. . . Now you really notice the steepness and instead of the risk of falling forward as you climbed up, you ought to recognize the risk of falling forward for a long way, on the way down. The washed away part is even more about balance now and probably the most challenging part of the whole thing. Go slow and expect it to take twice as long to go down.
At the bottom, you'll feel great and you can easily justify the stop at Leonards bakery on the way back to your hotel. If you are up for it, the 2nd and 3rd times are way better and easier. And the look on others faces when you are going back up is priceless. I saw one woman on her 4th.
Use the time change from the continental US to your advantage - GO EARLY before it heats up and before it gets crowded, dawn is the best. Bring water in a pack or belt so you don't have to use your hands. Don't bring young kids or pets. You should have some decent fitness to do this.