The annual Workshop on Algorithm Engineering and Experiments (ALENEX) provides a forum for the presentation of original research in all aspects of algorithm engineering, including the implementation, tuning, and experimental evaluation of algorithms and data structures. ALENEX 2008, the tenth workshop in this series, was held in San Francisco, California on January 19, 2008. The workshop was sponsored by SIAM, the Society for Industrial and Applied Mathematics, and SIGACT, the ACM Special Interest Group on Algorithms and Computation Theory.