The continued existence, relative size and distribution of Colorado River sand bars are of particular concern to river managers. Sand bars used as campsites for river runners and hikers are one of the principal limiting factors in determining visitor capacity in the river corridor. Campsite area is also the main metric used by Grand Canyon Monitoring and Research Center to evaluate the effects of Glen Canyon Dam on recreational resources in the Colorado River ecosystem. Over the past thirty years, Grand Canyon National Park, Glen Canyon Environmental Studies, and now the Grand Canyon Monitoring and Research Center have supported a variety of monitoring and research to examine campsite area and visitor capacity. In general, these efforts have provided valuable information. However, a lack of consistent inventorying and monitoring strategies in the different studies reviewed in this report precluded a detailed, quantitative temporal analysis of changes to campsites. A more consistent, comprehensive, and longterm approach to assessment and monitoring of campsites and visitor capacity is needed. Based on our review of past and current efforts, we recommend the following: 1) campsite area measurements should be collected using either total station or orthophoto methods, or a combination of the two; 2) conduct a comprehensive inventory of all campsites within the Colorado River corridor 3) conduct a comprehensive estimate of the visitor capacity of the Colorado River corridor; 4) develop an integrated long-term monitoring program for measuring campsite area and visitor capacity of the Colorado River corridor; and 5) convene a panel of experts in a workshop to begin the development of a long-term monitoring plan and to discuss management and institutional issues.