The River Arun is a river located in West Sussex, England. It flows for about 23 miles, starting in the South Downs and making its way to the English Channel at Littlehampton. The river is known for its scenic beauty and is surrounded by picturesque countryside. The River Arun is significant for both wildlife and recreational activities. It supports various species of fish and birds, making it a popular spot for fishing and birdwatching. Additionally, the river is used for boating and kayaking, attracting outdoor enthusiasts throughout the year.