Between July 25 and August 25, the NESEC-led GLOBE Observer team held the Mosquito Habitat Photo Challenge, which asked volunteers to collect concurrent observations of mosquito habitats and land cover. During this challenge, the team made a concerted effort to engage partners who could support volunteers in their communities. NESEC distributed clip-on cell phone microscopes to 15 partner organizations to support their participation in the challenge and in GLOBE in the future. Many of these partners held events or other activities to support volunteers. The Los Angeles Public Library translated the challenge activity tracker into Spanish and Chinese to better engage their communities and held a public webinar. Australia’s National Science Agency (CSIRO), Alabama Water Watch, the Earth Science Information Partners (ESIP), the Midwest Center for Vector-Borne Disease and NASA’s Science Activation Program all hosted webinars about the challenge. The San Gabriel Valley Mosquito and Vector Control District held an Instagram Live event with Autumn Burdick, GLOBE Observer communications lead. The Smoky Mountain STEM Collaborative included the challenge as part of an event called GLOBE in the Park. La Salle Public Library in Illinois recruited and trained a small number of very active volunteers, and the NASA STEM Enhancement in Earth Science (SEES) interns were among the top data contributors. NESEC will continue to cultivate these partnerships to enable ongoing community-based implementation of GLOBE with GLOBE Observer.