Getting to the "Y" is just the beginning! Once to the "Y", follow the trail for another ~2.15 miles to get to the peak and enjoy the spectacular views.
Once you get past the "Y", the remaining ~2+ miles to the peak are only lightly trafficked. The trail is no longer maintained past the "Y" and is narrow. The trail eventually splits before the final mile to the peak, and you'll want to be sure to go left. There are no water sources along the way, so pack enough water for the full journey.