Autumn lends itself to a journal built around colour rather than a list of sights. A familiar path may hold enough variation for several pages. The challenge is to describe those shades precisely while leaving the landscape undisturbed.
Choose three colours from one view and give each a short description. Avoid settling immediately for red, yellow and brown. Look instead for a pale edge, a darker fold or a muted patch beside something brighter.

Make a small page of colour swatches from memory after the walk. Add words that explain the lighting and the place. The difference between your remembered palette and a photograph can become part of the entry.
Return to the same view later in the season. Compare the balance of colours rather than expecting an exact repetition. The paired pages become a personal record of change, shaped by attention as much as by the scene.