Grand Challenges in Parkinson’s Disease brings together hundreds of scientists, clinicians and people with Parkinson’s to explore the latest Parkinson’s disease research. The theme for 2020 is When and How Does Parkinson’s Start?, which will focus on the origins and development of Parkinson’s, from potential triggers through the early symptoms and stages of the disease. Van Andel Institute and The Cure Parkinson’s Trust are thrilled to once again host Rallying to the Challenge, a meeting designed for and by people with Parkinson’s, advocates and care partners that delves into how the Parkinson’s community can impact and accelerate research. This symposium is also now free for participants to attend.