In the Cascade Mountains, the trail cuts through basalt outcroppings, exposing large cliffs that tower above the trail. West of Thorp, the trail cuts through a sandstone deposit.
| | • Cedar • Nobel Fir • Ponderosa Pine • Yew • Alder • Apple • Maple • Oak • Daisy • Foxglove • Lupines • Orchids • Paintbrush • Rose • Berries • Ferns • Moss or Lichens
| Remnants of the old railroad are still present: trestles, tunnels, bridges, signal foundations, ties, spikes, etc.
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