Start your weekend with an invigorating hike from The HIIT Factor on Larchmere to the Nature Center at Shaker Lakes, and back. Focus on the health of your mind and body while alternating between a brisk walk and naturalist-led nature breaks. Back at The HITT Factor, enjoy a complimentary sampler class led by fitness instructor, Haja Tunkara. Prepare for dirt trails and to hike about 3.5 miles. Registration required. Free. Donations welcome.