1. Mae Kok River is a popular tourist destination located in Chiang Rai, Northern Thailand. It is a beautiful natural attraction that offers scenic views and a myriad of activities for visitors. The river is approximately 130 km long and flows through lush forests, picturesque valleys, and small villages. Visitors can take a boat ride on the river to explore the surrounding areas and enjoy the stunning scenery. Some of the popular activities include kayaking, bamboo rafting, and fishing.

2. The working time for Mae Kok River varies depending on the activities you want to engage in. Generally, boat rides and kayaking tours are available from early morning to late afternoon. The phone number for further information on Mae Kok River is +6653-711226.

3. The cost of tickets for activities on Mae Kok River varies depending on the chosen activity. Generally, boat rides and kayaking tours cost between 500 and 2000 baht, while bamboo raft rides start at 200 baht. Transportation to Mae Kok River can be done through public transport or private car hire from Chiang Rai City Center.