dynamicWatch Premium lets you view the elevation profile and statistics for a route. This is available both when viewing a route, or when creating or editing a route in the Planner. You can drag across the graph to select portions of it, if, for example, you'd like to see the average grade on one particular climb.
This feature and many others are available with a dynamicWatch Premium subscription for $9.99/year, or a one-time payment of just $29.99 for an Endless plan.
Learn more about this feature in the Help Center.