Quickly did the math. The real trail is ~390 km long, with 23,500 m of elevation gain and 14 Alpine passes. I found that Minecraft walking speed is 4.317 m/s (1 block = 1 m), so that's ~25 hours of continuous walking, or ~33 hours assuming 75% movement efficiency for terrain. That's one Alpine pass every ~2.4 hours, and a new hiking-stage destination every ~1h40!