There are numerous wonderful hiking trails and picnic spots up Mill Creek Canyon, all with beautiful views. Trail difficulty ranges from easy to difficult, check out Alltrails.com for specific details on trails available.
Every weekend in the fall Snow Bird Ski Resort hosts an Oktoberfest celebration. Admission is free, there are lots of local breweries, good food, activities and beautiful views.
Downtown Salt Lake is ever changing but there is always something fun for nearly everyone to do. There is shopping at the City Creek Mall, great restaurants, and an eclectic range of bars to explore.
If you are looking for a mountain getaway, look no further than Park City. Explore downtown with great food and drinks, try the mountain coaster at the Olympic Park or visit one of the 3+ ski resorts in the area.