Grayback Parallel

No permit or access details on file for this trail — check with the local land manager before you go.

Grayback Parallel is a 19.8-mile out-and-back trail located in Wyoming. This lengthy backcountry route offers hikers an extended wilderness experience in the state's scenic terrain. The out-and-back format means you'll retrace your path on the return journey, covering approximately 39.6 miles total if you complete the full distance. The trail is suitable for experienced hikers prepared for a full day or multi-day adventure given its substantial mileage. While elevation gain data is not available, the trail's length suggests a moderately demanding trek. Hikers should come prepared with adequate water, supplies, and navigation tools. This route provides access to Wyoming's natural landscape away from heavily trafficked areas. The out-and-back structure allows flexibility—hikers can turn around at any point rather than committing to the full distance, making it adaptable for varying fitness levels and time constraints.