Most guitarists learn Box 1 of the pentatonic scale and then live there for years. The way out is simpler than it looks: the five boxes overlap, and each box shares one side with the next. Those shared notes are a bridge. Learn where they are and you can slide from one box into the next without stopping, and the whole neck opens up one step at a time.
Here are Box 1 (blue) and Box 2 (orange) of A minor pentatonic played together. The split notes belong to both boxes: they are the top of Box 1 and the bottom of Box 2 at the same time.

Shared notes: low E string fret 8; A string fret 7; D string fret 7; G string fret 7; B string fret 8; high e string fret 8. Open Box 1 + 2 in the fretboard →
Every minor and major pentatonic key, plus fretboard notes and CAGED. One download, print the keys you need.
Download all charts All 26 free charts →Every pair works the same way. Once Box 1 and 2 feel easy, add one pair at a time. After Box 5 the pattern starts again: Box 5 connects back into Box 1, 12 frets higher.

Shared notes: low E string fret 10; A string fret 10; D string fret 10; G string fret 9; B string fret 10; high e string fret 10. Open Box 2 + 3 in the fretboard →

Shared notes: low E string fret 12; A string fret 12; D string fret 12; G string fret 12; B string fret 13; high e string fret 12. Open Box 3 + 4 in the fretboard →

Shared notes: low E string fret 3; A string fret 3; D string fret 2; G string fret 2; B string fret 3; high e string fret 3. Open Box 4 + 5 in the fretboard →

Shared notes: low E string fret 5; A string fret 5; D string fret 5; G string fret 5; B string fret 5; high e string fret 5. Open Box 5 + 1 in the fretboard →
Put the pairs together and you have one continuous scale from the open strings to the 15th fret. Each color is one box; every note sits in at least one box, and the overlaps are where you move between them.

Use the notes the two boxes share. The top notes of Box 1 are the bottom notes of Box 2, so you can slide from Box 1 into Box 2 on any string and keep playing without stopping.
Each box is one position of the same five-note scale. Box 1 starts on the root on the low E string, and Boxes 2 to 5 follow up the neck before the pattern repeats 12 frets higher.
Yes. The shapes and their order never change; only the starting fret moves with the key.
Most players can connect one new pair a week with five to ten minutes of daily practice, so all five boxes in about a month.
More guides: pentatonic boxes guide · breaking out of the box · learning the fretboard notes · mixing major and minor pentatonic · left-handed scale charts · guitar modes explained.