In this study, we enacted critical participatory action research (CPAR) within an online community of practice (CoP). The CoP was designed to build a community of outdoor play and learning (OPAL) practitioners. This paper describes how a cohort (n=18) of experienced Kindergarten to grade eight (K-8) teachers from across British Columbia shared their OPAL experiences and practice and the collective action taken. Regularly scheduled meetings over a six-month period resulted in dialogue that identified the need for quality resources that were accessible for all teachers. The concept of a website, developed for teachers by teachers experienced with OPAL, was initiated within the CPAR process. This article describes findings related to participation in a CPAR CoP, and the process of deciding upon and enacting shared action to support OPAL elementary school teachers.