PA-28 Cherokee/Archer/Dakota/Pillan/Warrior
Flight Crew Air Transport Pilot (ATP); Flight Crew Flight Instructor; Flight Crew Flight Engineer
Flight Crew Last 90 Days 35; Flight Crew Total 20700; Flight Crew Type 1050
Situational Awareness
Deviation / Discrepancy - Procedural Clearance; Ground Incursion Runway
Air Traffic Control Issued Advisory / Alert; Flight Crew Became Reoriented
Airport; Human Factors
This was my first time into LSE. After receiving and acknowledging taxi instructions and while taxiing to RWY 36 for departure I passed the hold short line without stopping.  The controller called saying that I had passed the hold short point at which point I stopped.  He asked if I would be ready for takeoff soon to which I replied in the affirmative; he then cleared me for takeoff.I was using an expansion of the small fore-flight airport diagram on the LSE home page rather than the larger diagram associated with the taxiways button. That diagram has a hs-1 balloon in the location where the problem occurred.  When I went past the hold-short markings I remember thinking the hold-short was for RWY 4 and that since it was so far from RWY 36 that there would be another hold short area for that runway.  Had I been using the larger airport taxi diagram I don't believe I would have made this error.
PA-28 pilot reports not recognizing the Runway 36 (and Runway 4) hold line on taxiway F at LSE and continues on to taxiway E. ATC notes the incursion.