Get up early, grab a power bar and a coffee and take off for the day. Hike about 2 miles roundtrip at Cascade Falls to get killer views of Cascade Lake from the top. Be aware of the elevation change — it’s not a race, and make sure to pack water and a snack (but don’t bring beef jerky, because bears). Don’t forget your selfie stick to prove to social media that you are in Lake Tahoe and overlooking the lake to make the rest of us jealous.
After your hike, make the hour or so drive over to Sand Harbor and prepare yourself for awesome. Take the path around so you can check out all the boulders that are in the water. After walking by foot, rent a paddle board (most places are cash only) and head out into the crystal clear and chilly waters.