Pathfinder

See above

Master Explorer

Starting at 3rd level you have mastered exploring through any terrain. Once per day as a bonus action you may treat any type of terrain as your favored terrain. If used during travel you treat that terrain as favored for 1D4 hours and if used in combat treat that terrain as favored for 1D4 rounds. If you enter a combat encounter and the travel use of this is active, half the amount of hours remaining (rounded up) and you have that many rounds of this feature being active in combat. The amount of time the feature is active increases to 1D6 at 6th level and 1D8 at 9th level.

 

Advantageous Fighter

At 3rd level you have learned to use the environment around you to your advantage. When making you have advantage on attack rolls and hiding while in your favored terrain or terrain that is treated as your favored terrain. 

 

Hidden Shot

Starting at 7th level you have become a master of hiding and camouflaging yourself into the environment around you. While hidden or in your favored terrain or terrain being treated as your favored terrain, ranged attacks you make crit on a 19 or 20.

Environmental Blockade

At 11th level, your knowledge of the wilderness has grown, allowing you to avoid the attacks of an oncoming foe far easier. While in your favored terrain or terrain being treated as your favored terrain you may use your bonus action to give the next creature to attack you disadvantage on their attack roll. This ability may only be activated once per round. 

Terrain Expert

Upon reaching 15th level, you have become an expert in many types of terrain. You gain one additional favored terrain of your choice and ranger spells cast in your favored terrain or terrain that is treated as your favored terrain have advantage on hit rolls. On top of this you gain Expertise in the Survival and Nature skills.