This past summer, the staff and summer interns at the nature preserve I was working at did a month long iNaturalist bioblitz competition. We had prizes for the most observations, highest biodiversity of observations, most taxons, most IDs provided… and a few others. Across the 15 staff members who took part in the competition, we had 39 first research grade observations of species in our county, including even some birds and mammals. We collected 1,372 observations of 422 species, but mostly we had a ton of fun. It not only was a great way to get us all out on the land and looking for new things, but also exposed staff members to a new educational tool that is now being used across our departments.
Feel free to PM me if you want more specific details!