I am not a mountain climber nor adventurous as I used to be, however as others have noted reference to climbing Denali - there are a lot of preparations and mandatory requirements involved, and there are deaths recorded every year.
Weather in the area generally does not cooperate, the winds tend to get real fierce, as well as being lucky enough to see the whole mountain in it's clear state with no cloud cover of any kind for an average of only seven percent of the time.
I know one person who has climbed the peak tell me the group was three and a half days behind schedule because they had to wait out for the bad weather to improve while crossing their fingers for the weather to actually improve in the higher elevations facing uncertainty, dealt with practically zero visibility quite a few times, and claimed he didn't start using his oxygen until he reached past the 18,000 foot level....and if he had the money and the opportunity he would attempt to go take on the K2 Summit, yikes.
I was also told that once you proceed past the base camp at the 17,000 foot level, you are pretty much on your own from that point on upon being rescued in a proficient matter.....Army rescue helicopters proclaim they are pushin the threshold beyond the 16,000 foot level and dependent on the current conditions to even make it that high at times, as they did rescue a group a few years back at the 18,000 foot level but the elements were right enough upon a small break in the weatherfront along with major concerns of the rescue helicopter used upon potential stalling at that high altitude.
The official name of the mountain once again has created scrutiny everytime the state of Alaska gets the opportunity to propose a name change pleading their case to the federal government.
In Hollywood California while I was in grade school, they taught us kids the name of Mount McKinley as I never heard of Denali until the national park name change.
After living in Alaska for over 31 years (well after the national park's official name change to Denali or "post Denali era"), I refer to the mountain as "Denali" more often than I do "Mt. McKinley" as I have grown accustomed to most Alaskans that I associated with that do the same.
Upon the latest proposals by the state of Alaska to have the mountain name officially changed, the US Government still rejected the name change due to strong opposition from Ohio senators and reps with McKinley's ties to Ohio to not only keep the name stake, but then added stronger stipulations and guidelines to ensure the McKinley name stays official for that mountain.
In the eyes of the federal US Government, the official name is Mt. McKinley....
In the eyes of the state of Alaska Government, the official name has been Denali since 1975 as that is the only name the state will recognize...
After the latest name change proposal to the feds was rejected again, the state legislation held a brief special session to also keep the name stake intact, adding stronger stipulations and guidelines in the same manner as the feds did to ensure the Denali name stays official for that mountain.
As far as the "peak" is concerned, I always heard both the north peak and (the highest point) south peak of the mountain summits are always referred to as "McKinley Peak".