Organise the pack by function

Rather than memorising a list, it is easier to think in functions. Each function is a question the trail might ask, and each item is part of the answer. If a function is covered, the specific brand or model matters far less.

Functions and what they cover
FunctionWhat it covers
NavigationMap and compass, plus a charged device if you use one
WaterEnough to drink, with a means to treat more if the route allows
LightA headlamp, even on a short day, with spare power
InsulationThe spare layer from the layering notes
First aidA small kit you know how to use
Sun protectionBrimmed hat, sunglasses, sunscreen
FoodMore than you plan to eat, for a longer day

Navigation comes first

A phone map is useful, but on many Canadian trails coverage is partial and battery drains faster in the cold. A paper map of the area and a basic compass do not run out of charge. Knowing how to relate the two to the terrain in front of you is the skill that makes the equipment worth carrying.

Why light, on a day hike?

A headlamp is the item most often left behind and most often regretted. A late return, a wrong turn or an unexpected delay can put the last stretch in fading light, and a small headlamp turns that from a problem into a non-event.

Water and food for the actual day

How much water and food you carry should follow from the time estimate in the planning notes, not from habit. A longer route, a hot day or a steep climb all raise the amount you need. Where natural water sources exist along a route, a means to treat water lets you carry less at the start and refill as you go, but treat all backcountry water before drinking.

First aid you can actually use

A compact first-aid kit covers the common day-hike problems: blisters, small cuts and minor scrapes. The kit is only as useful as your familiarity with it, so it is worth checking the contents and replacing anything used before the next trip.

Match the pack to the plan

The right contents depend on the route and the season. Re-read the planning notes for the day, decide which functions the conditions emphasise, and pack to cover them rather than carrying the same load every time.

References

For trail-specific advice and current conditions, consult the official authority for the area, such as Parks Canada for national parks, along with the relevant provincial parks service.