Learn how to use the iNaturalist App in advance of the April 27-30 City Nature Challenge 2018, a worldwide competition to see which city can make the most nature observations on their smart devices of local plants and animals over a 4-day period. You can attend an informal training at the MTRP Visitors Center on Saturday, April 21 beginning at 10am or 11:30am, with time until 1pm to go out to practice and return to the Visitors Center for additional help. If you don’t need the training, simply get out in nature between April 27-30 and document your observations through the iNaturalist app. You can use iNaturalist anytime, but the 2018 City Nature Challenge takes place 4/27-4/30. Look for the project City Nature Challenge 2018: San Diego County.