I would also use Audacity .
This is from Audacity FAQs:
How can I split a long recording into multiple files or CD tracks?
Follow these steps to create a separate file for each song or segment of a long recording. This is particularly useful if you are creating a CD, since each file will appear as a separate track on the CD.
1.Click to place the cursor at the start of the first song.
2.Choose â€œAdd Label at Selectionâ€ from the Project menu (or Tracks menu in Audacity Beta). If you wish, you can type the name of the song.
3.Repeat steps 1 and 2 for each song.
4.When you are finished, choose â€œExport Multipleâ€ from the File menu. 5.When you click the â€œExportâ€ button, Audacity will save each song as a separate file, using the format and location you choose.
Alternatively, Audacity can attempt to detect the silences between tracks then label them automatically using Analyze > Silence Finder. If you do not have Silence Finder in your version of Audacity, it can be found in the http://wiki.audacityteam.org/w/images/8/8d/NyPlug-ins_126.zip .
You will just be doing this to split the audio . Same as two long songs.
Find a "Silence" at close to the 60 minute time you want .