How long does it take to climb Mount Śnieżka from the Czech side?

From Pec pod Sněžkou via Obří důl it is about 8.5 km and about 2.5 hours on foot to the summit. The trail through Obří důl is steep near the end and may be closed in winter. You can also take the cable car from Pec — the ride takes about 15 minutes.