Falls by older people (aged 65+ years) are linked to disability and a decrease in mobility, presenting a challenge to active ageing. As such, older fallers represent a vulnerable road user group. Despite this, there is little research into the causes and prevention of outdoor falls. This paper develops an understanding of environmental factors that cause falls or fear of falling by using go-along interviews with recent fallers to explore how they navigate the outdoor environment, and which aspects of it they perceive facilitate or hinder their ability to go outdoors and fear of falling. While there are a number of audit checklists that are focused on assessing the indoor environment for risk or fear of falls, nothing exists for the outdoor environment. Many existing street audit tools are focused on general environmental qualities and have not been designed with an older population in mind. This paper presents a checklist that assesses aspects of the environment that are most likely to encourage or hinder those who are at risk of falling outdoors, it is developed through accounting for the experiences and navigational strategies of elderly individuals. The audit checklist can assist occupational therapists, urban planners, designers and managers in working to reduce the occurrence of outdoor falls among this vulnerable user group.