Comparing the Mount Stephen Fossil Site and the Walcott Quarry in Yoho National Park reveals two distinct guided hikes: Mount Stephen is shorter (approx. 8–9 km round-trip) with steep climbing and large, abundant trilobites, whereas the Walcott Quarry is a much longer trek (approx. 22 km round-trip) showcasing world-famous soft-bodied fossils. Both protected sites require a licensed guide.Trail and Physical DifferencesMount Stephen: ~8 to 9 km round-trip; features a shorter but very steep, relentless uphill climb with a high elevation gain over a short distance.Walcott Quarry: ~22 km round-trip; a long, full-day endurance hike starting near Takakkaw Falls, featuring a more gradual but extended ascent.Fossil Types and ExperienceMount Stephen: Best for seeing large, abundant, and obvious "stone bugs" (trilobites like Ogygopsis klotzi and Olenoides serratus) right underfoot in the talus layers.Walcott Quarry: The historic mother-lode site discovered by Charles Walcott in 1909, famous for incredibly preserved, rare soft-bodied middle-Cambrian organisms and a wider variety of creatures.