Alta Ski Area

• Beginner 11 mapped lines
• Intermediate 35 mapped lines
• Advanced 73 mapped lines
• Expert 2 mapped lines
• Unrated 11 mapped lines
• Lifts 11 mapped lifts
• Bowls & glades
• Glade: tree-skiing area, edges approximate
• Bowl: open area, edges approximate
• Contours every 100 ft

Point at an entry to pick out its lines; click to keep it. Point at a line to name its run; click it to tick.Tap an entry to pick out its lines, and again to clear. Tap a line to name its run and tick it.

Seen as a trail map shows a mountain: from the base looking uphill, the ground tilted up (heights ×1.5); the arrow points north and the scale holds across the page. Runs and lifts as OpenStreetMap's contributors have mapped them, on the ground from USGS elevation data, with a stronger contour every 500 ft. The key counts the lines OpenStreetMap draws, not the resort's runs (its own list is under Runs); bowls and glades mapped as areas are a faint fill in their difficulty's colour. The resort's glades and bowls are drawn as areas: OpenStreetMap's own where it maps one, otherwise drawn by Aurora around OpenStreetMap's line, up to 60 m each side and halfway to the next run or lift, so their edges are approximate.