Mason Lake via the Ira Spring trail is one of my favorite 1-90 hikes. Its short and a little steep, and offers amazing views from the trail. The trail ends at Mason lake, but many other trails from the lake will take you deeper in the Alpine Lakes Wilderness area. These picture are from two different hikes, one in July of 2017, and one in June of 2018. To visit the WTA page for Mason Lake, Click here.