Both Mountains are at the sides of Machupiccchu archeological site. You can hike these extensions before or after the guiding tour at Machupicchu archeological site. Huaynapicchu is very demanding You need to book this month in advance to get to its summit it will take 45mn to 1 hour. On the other hand, Machupicchu Mountain along the last years is getting very popular and demanding but not like Huaynapicchu So You can get some spots for You even the same month of the service the path is longer an could take one hour and half to get to the summit.