We often hear of the pipeline in Olympic sport. The path to the highest level of elite competition. The pipeline is not consistent in diameter: Wide-mouthed at its start, tapered to needle-wide at its terminus. There are many ways to identify talent within a pipeline. In the cross-country ski world, there are incremental benchmarks to progress to the next tier. Within U.S. Ski & Snowboard, for example, skiers in the pipeline begin in the club...