BigNeuron is a community effort coordinated by The Allen Institute for Brain Science that aims to define and advance state-of-the-art of single neuron reconstruction. The project has been successful with more than 28 tracing methods ported, and 35,000+ neuron images collected worldwide. The original target of generating 0.5 millions of neuron reconstructions has been well surpassed as more than 1.2 millions of reconstructions have been generated. During 2015-16, INCF has co-sponsored the hackathon activities.