Alpine crochet stitch
Raised US front-post treble stitches reach down two rows through alternating dc and sc rows.
Counted practice swatch
Chain 17. Row 1: sc in second chain and across (16).
Work the repeat
Row 2: ch2 (not counted), dc in every stitch. Row 3: ch1, sc across. Row 4: ch2, dc in first; [front-post tr around next dc two rows below, skip the sc above that post, dc in next sc] 7 times; dc in last (16). Row 5: sc across. Row 6: dc in first 2; [front-post tr around next dc two rows below, skip its sc, dc in next sc] 6 times; front-post tr at next post, dc in last. Repeat rows 3–6, alternating raised positions.
Read the fabric
Every raised stitch replaces one stitch in the row above. Pull the treble tall enough that the fabric does not pucker.