Two distinct situations, one rule
In Pedersen v. Zielski (Alaska 1991), the Alaska Supreme Court laid out exactly how its discovery rule works under AS § 09.10.070, and identified two genuinely different situations where it applies. The rule is "most clear," the court explained, when the injury itself is undiscovered and reasonably undiscoverable within the normal two-year period. But the court went further: the rule also applies to a second, distinct situation — where the injury is known, but its cause is unknown, and reasonable diligence wouldn't have led to discovering that cause either. In both situations, the two-year clock starts from the date of actual or reasonable discovery, not from the date of the injury itself.
The test: what a reasonable person should have known
A separate Alaska Supreme Court decision, Russell v. Municipality of Anchorage (1987), framed the relevant inquiry precisely: the date when the injured person reasonably should have known of the facts supporting their claim. This is an objective standard — it's not about when someone actually put the pieces together personally, but about when a reasonably diligent person in the same position would have.
Toxic exposure: the clock waits for the illness itself
Alaska courts have applied a specific version of the discovery rule to toxic tort cases: the statute of limitations doesn't begin running until the plaintiff's disease actually manifests itself as an illness, rather than from the date of the underlying exposure. This matters because gradual, cumulative exposure to a harmful substance can predate any noticeable symptom by years, and Alaska's rule specifically accounts for that gap rather than starting the clock on a date that had no practical meaning to the person exposed.
Minors: the clock waits for adulthood
In Sands v. Green (Alaska 2007), the Alaska Supreme Court held that a person injured as a minor has until two years after turning 18 to bring suit — rather than the ordinary two-year clock running from the date of the injury itself, which for a young child could otherwise expire long before they were ever in a position to pursue a claim on their own.
A 10-year outer limit regardless of discovery
None of these discovery-based extensions are unlimited. Alaska's separate statute of repose, AS § 09.10.055, generally bars an action more than 10 years after the last act alleged to have caused the injury, for actions accruing on or after August 7, 1997 — a hard outer boundary that applies regardless of when the injury was actually discovered. The repose period specifically excludes claims involving defective products and injuries from prolonged exposure to hazardous waste, so those specific categories aren't subject to this particular 10-year cap.
What doesn't pause the clock
A genuinely common and costly misunderstanding: actively negotiating a settlement with an insurance company does not toll or pause Alaska's filing deadline. The two-year clock keeps running the entire time talks are ongoing, discovery-rule extension or not.