The Pranburi Park Reserve is set on a strip of land connecting Hua Hin and Pranburi. Here you'll find a wooden walkway which cuts through a dense mangrove forest. The loop takes about 45 minutes to finish.
Bottom-line: A relaxing walk in a unique setting. If you've never been to a mangrove forest before, this provides a nice, relatively quick introduction.
Pranbutri starts about 20 minutes south of Hua Hin, but the Pranburi beach areas range from 30 to 40 minutes from Hua Hin, just beyond Pranburi is Dolphin Bay close to the Sam Roi Yot National Park.
Most of the Pranburi Hotels and resorts and also those in Dolphin Bay and the area close to the Sam Roi Yot National Park are listed as Hua Hin. This I pressume is that pranburi is not yet recognized as a destination in it's own right, however it is becoming more popular as a quiet and relaxing beach area beyond Hua Hin. As part of the Sunrise Coast Pranburi has inexpensive beach places to stay right up to top boutique resorts and the luxury Evason Resort and Evason Hideaway Resort and other Pranburi hotels and accommodation.
Close to the national park plus the long coastline this is very much a rest and relaxation area.
The beach is honestly not great, but, the beach areas are quiet and very long, it you are after peace and quiet but within say 30 to 40 minutes of the center of Hua hin these accommodation might be of interest.
Also easy access to the national park, farmlands and rural areas. Snorkeling at Bang Saphan / Koh Talu about 2 hours south.
Do tke the opportunity when visiting Hua Hin to go along the Pranburi River.
There are trips around Pranburi that can include a river trips and also the Sam Roi Yot National Park.
Great natural scenery.