### Instruction: can you recommend fun activities to enjoy in Austin in summer?
### Response: Summer can be hot in Austin, with historical highest temperatures went above 100 Farheiths. Outdoor activities are challenging in the torching sun and steaming air. Luckily, Austin, as part of the Hill Country, has a lot of hiking trails with shades and mild elevation. Hiking in early morning is enjoyable if you are an early bird. You can still enjoy outdoors in summer with water. Kayaking, SUPs, tubing, canoeing, swimming, and boat tours are available at public parks or with hosting companies at Lake Travis. Alternatively, enjoy cool AC empowered indoor gyms and playground in July or August.