This 7.5 mile hike to an elevation of almost 3000 ft is a good challenge for your endurance. Start earlier in the AM to escape the direct Sun.
My pro tip to prepare for such hikes, if you are an amateur hiker, is to include resistance training in your workouts.
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Plain water for hydration is good enough. Snack on nuts and recharge with a banana or an apple when you summit. Brings back the essential sugar you have been