Preheat: Heat oven to 425°F (220°C). Line a baking sheet with parchment.
Coat: Toss pumpkin seeds with salt, maple syrup, and olive oil until evenly coated.
Spread: Arrange in a single layer on the sheet (avoid stacking so they crisp).
Roast / turn (site stub): Bake at 425°F. Turn at 5 minutes, 9 minutes, 13 minutes, and 16 minutes, then every 2 minutes until done (golden, fragrant, crisp). Watch closely near the end so maple does not scorch.
Cool: Cool on the sheet, then store airtight once fully cool.