Free calculators to help you plan smarter before you hit the trail.
How long will your hike take? Enter distance and elevation gain to get a time estimate using a modified version of Naismith's Rule, adjusted for your pace and terrain. Montana Mode pre-selected.
Calculate Hiking Time →How much food do you need, and how heavy will your pack be? Enter trip length, group size, and trail intensity to estimate calorie needs, food weight, and total starting pack weight. Includes a bear canister heads-up for longer trips.
Calculate Pack Weight →Want to summit at sunset? Enter the local sunset time, how early you want to arrive at the top, and your one-way hiking time. Get an exact "leave the trailhead by" time — plus a headlamp reminder for the dark hike down.
Calculate My Start Time →Most hiking calculators are tuned for well-maintained trails in flat terrain. These are built with Montana in mind. The hiking time calculator defaults to Rocky/Technical mode because most trails in the Gallatin Range, Beartooths, and Crazy Mountains involve loose rock, creek crossings, and altitude that make standard formulas too optimistic. The backpack weight calculator includes a bear canister alert because food storage requirements in Montana backcountry are real, and planning for them before you pack matters. The sunset calculator solves the specific problem of working backward from a moving target — figuring out when to leave the trailhead so you're on the summit when the light is right.
All tools are free, work on mobile, and don't require an account. Use them as starting points — no calculator knows your fitness level, your weather window, or whether there's still snow on the pass. Build in a buffer. Go find something good.