Here are the details of the trip from Luzern.
First part is more detailed as need to find way through the city and the forest.
Route:
Luzern
-> Kriens
-> Himmelrich
-> Fräkmüntegg
-> Oberlauelen
-> Chlimsenhorn
-> Pilatus
Detailed:
Luzern (8:25) -> S4 (4 min) -> Krienz Mattenhof (before 9AM)
Krienz Mattenhof -> Brandistr -> Kreuzstr -> Motelstr -> leave Dam on right getting out of Krienz
-> Bodenmatt str -> Kreuel str -> Panorama Hotel Himmerlich
-> Schattenbergstr -> passing restr. Burestubli on right -> left on Bruderhussen str -> right on Krienseregg str
-> pass Krienseregg on left -> Follen str -> can make shortcuts towards Follenwald str
-> Fräkmüntegg
=> this part is ~12K so <3h -> we should reach Fräkmüntegg before noon
-> then just follow main points
Will pack light as weather good and long trip with steep climb.
http://www.hikr.org/tour/post7595.html