When should you register?
The advice every runner hears — register early or you'll miss out — is about the wrong risk. Across 415 Canadian races that publish a registration window, the median one stays open until 2 days before the race. You will rarely lose the spot. What waiting does cost you is money — and we can say that from races we have watched rather than from the fee tables: 624 published entry fees have actually gone up since September 8, 2026, a median of $9 more for the same bib. The real deadline is usually your own training block, not the entry cap.
You probably won't lose your spot
When registration actually closes, by share of races:
The final-week closes are mostly logistics, not scarcity — the organizer needs to print bibs and order medals, so online entry shuts a few days out even when the field is nowhere near full. Many of those races still take race-weekend entries in person.
The price you see has an expiry date
84 of the 266 priced entry windows on this site close within 30 days — 32% of every price currently published on the calendar. For most races that is registration closing outright; for the rest it is an early tier ending and a dearer one taking over. Either way the price in front of you today is not the price that will be there in a month.
One thing this data cannot do is tell you which race will raise its fee. A race listing shows the window currently on offer, never the tier that follows it — so a closing window means this price ends, not that a higher one is scheduled. What the site can do is watch, and re-read every fee table on a rolling cycle. That is the section below.
Every race page here shows the current fee per distance and the window it applies to — and what a normal price looks like is in what races cost in Canada.
We've watched it happen
Everything above is read off published fee windows. This part is observed: since September 8, 2026, our nightly re-checks have caught 754 published entry fees actually changing across 216 races. 624 of them went up — the median step was $9 more for the same bib (+12%), and the sharpest more than doubled overnight.
And the rises land later than most people plan for. Counting each increase against its own race date, the median one arrived 82 days before race day — half of them between 38 and 244 days out (227 increases on races with a confirmed date). In other words the money usually leaves the table about three to five weeks out, which for most people is after they have decided to run it and before they get round to entering.
The step is also steepest at the short end, which is the opposite of what runners tend to assume:
- 5Kmedian +14% (182 increases)
- 10Kmedian +11% (103 increases)
- marathonmedian +10% (12 increases)
- halfmedian +8% (31 increases)
The 5K — the entry nobody thinks twice about — gains the biggest share of its price (+14%), while the half moves least (+8%). On a $40 entry that is small money in dollars; it is the pattern that is worth knowing, not the amount.
130 fees moved down, across 31 races (Mount Robson Marathon; Picture Me In A Tree 5 km, 10 km & 6 Hour Trail Run or Walk, among others)— but most of those are not discounts. 70 of the 130 are the same amount coming off every distance in one race on the same day (across 19 races), which is a platform fee being reconfigured rather than an organizer cutting the price. Genuine late discounting exists, but it is rare enough that waiting for it is not a plan.
The exceptions do sell out
20 races on the calendar currently have at least one distance marked sold out, and another 46 are flagging limited spots. The pattern in that list is specific: the big-city marathon weekends, trail races with permit-capped fields, and special-format events — night runs, and the small capped distances inside bigger races. Open-course road 5Ks and 10Ks almost never appear on it. If your goal race is a major marathon or a capped trail event, the register-early advice is real; for most road races it is folklore. The full live sold-out list — including the races down to their last spots — updates nightly.
Currently sold out on at least one distance:
- The Lost Valley Trail Race 2026 — October 24, 2026, Dundas
- Race Against Time 2026 — November 21, 2026, Hamilton
- Frightening 5er — October 29, 2026, Winnipeg
- 41st Annual Fall Classic 5 and 10 Miler DONUT Road Race — October 25, 2026, Edmonton
- Trail du Grand-duc 2026 — October 25, 2026, Stoneham-et-Tewkesbury
- The Beav Trail Race 2026 — November 7, 2026, Milton
How this was counted
Registration windows come from each race's own listing on its registration platform — 415 of the 663 dated races on the calendar publish one. Price-tier end dates are read from the per-distance fee tables the same way. Everything recomputes nightly, so the “84 windows close” figure is current, not a snapshot. The observed movements are different again: every fee table is re-read on a rolling cycle, and any fee that differs from the previous read is logged — a movement record that started September 8, 2026 and grows with every check.
One honest caveat: races that don't publish a close date are usually the small, informal ones — the kind that take entries at a folding table on race morning. If anything, including them would push the “you won't lose your spot” finding further in the same direction.