The Expedition Leader Style Analysis (ELSA) is an inventory designed to measure leadership style adaptability and effectiveness in terms of the situational leadership model. Situational leadership arose from the Experiential Leadership Education model, which is used in business and management, by replacing management jargon and phrases with outdoor terminology. The key to the leader style selection in situational leadership is to assess the maturity or readiness of the followers, then choose a corresponding style from "telling,""selling,""participating," or "delegating." Situational leadership integrates both task and relationship components and corresponds well with group development theory, which makes it ideal for use with expeditions. The ELSA instrument, which is presented in its entirety, consists of 12 situations, each having 4 alternative decisions, representing the 4 different leadership styles used in situational leadership theory, telling, selling, participating, and delegating. The respondent is directed to select the most appropriate response for the four alternative choices. This selection results in scores in each of the different styles. The ELSA inventory enables students to see which of their leadership styles need practice and which need to be used less. In a training session, inventory results are good starting points for discussion about how to make the decision or what style to use by targeting the readiness of the group. The ELSA is valuable in educating outdoor leaders and can also be used to show changes in dominant and supporting styles after some practice. (TD)