Eldora runs no summer bike park. Here's the real lift-served downhill lineup near Boulder — Trestle to Vail — and the storm clock that decides your ride.

Boulder's foothills can flip conditions 30°F in two hours — a practical two-stage guide to what to check before your morning commute and before the ride home.

Boulder's summer thunderstorm cycle fires reliably between 1 and 7 p.m. — the meteorology behind the pattern and how to plan any outdoor ride around it.