Start with the question
What does a rescue time actually measure?
Source findingA 10-year Yosemite review reported a mean of 5 hours from notification of YOSAR to arrival at definitive care: 3 hours 6 minutes to reach the scene, followed by 1 hour 54 minutes from scene arrival to care. The dataset covers 1990–1999; it is historical U.S. context, not a current response-time estimate.[1]
SynthesisThat clock begins when rescuers are notified. It leaves out the time between the incident and notification. Its care endpoint could include the Yosemite Medical Clinic; it is not a uniform measure of time to hospital treatment.[1]
Source findingFor international context, the Alpine severe-trauma cohort reported mean accident-to-hospital admission time of 117.4 minutes (SD 142.9; n=91; range 30–1,047). Patients had to arrive with vital signs. This different population and clock cannot be pooled with the Yosemite mean.[2][1]
SynthesisRead together, the studies show why one rescue number is easy to misuse. The start, endpoint, setting, patient selection, and era all change what the number means. Neither study estimates today’s youth mountain-bike evacuation time or proves that a particular course improves outcomes.[1][2]
MTN educational interpretationFor trip planning, think from the accident or illness to treatment at an appropriate hospital. Recognition, communication, reaching the patient, care, evacuation, and transport may all contribute. A nearby road or trailhead does not close that whole interval. This is MTN’s planning interpretation; the five stages below have no invented durations.[1][2]
Study at a glance
Who—and what—was studied?
Population
U.S. lead: Yosemite National Park, 1990–1999, 1,912 search-and-rescue missions assisting 2,327 people. International context: 94 selected severe mountain-trauma patients in the IATR; accident-to-hospital timing was available for 91.
Design and setting
Two retrospective observational cohorts. Yosemite includes injured, ill, missing, and stranded people; the Alpine cohort selected severe trauma with vital signs on hospital arrival.
An MTN planning illustration
Plan the whole journey.
Select a stage. These steps have no assigned duration and are not a rescue-time forecast.
The start of the journey
First, establish the clock.
The incident may precede the emergency call. A study starting at dispatch does not measure that earlier interval.
Educational interpretation. Study timing definitions appear separately below.
Measured intervals · Keep the clock attached
What the clock measures.
California · 1990–1999 records · Published 2007
Clock: Notification of YOSAR → Arrival at definitive care
5 hours mean · 300 minutes186 minutes to reach the scene.
114 minutes after scene arrival.
Study scope: 1,912 SAR missions and 2,327 people. A separate timing denominator and variation were not reported.
This historical clock excludes the interval before notification. Definitive care could include a clinic. It does not measure incident-to-hospital-treatment time or predict a modern rescue.
Read the U.S. source and clock definition ↓Different starts, endpoints, populations, and eras. No pooled average is calculated. Australian evacuation timings are excluded.
Keep the boundaries visible
What this evidence cannot tell us.
- Yosemite observations are from 1990–1999. Communications, rescue systems, and access may differ today.
- The Yosemite sample includes searches and assistance to uninjured people; it is not a mountain-bike patient cohort.
- Yosemite reports mean intervals without a separate timing denominator or spread for each interval. A mean is not a promise or upper limit.
- Notification-to-definitive-care, accident-to-hospital admission, and incident-to-hospital treatment have different boundaries.
- The Alpine cohort includes selected severe-trauma survivors to hospital arrival and is not U.S. evidence.
- Australian ambulance timings are excluded from this rescue-time synthesis. Australian findings are retained separately only for medical and environmental context.
- These studies cannot supply a contemporary U.S. NICA evacuation average or establish an effect of first aid training.
Read the originals
Sources & review record.
1. Hung EK, Townes DA. Search and Rescue in Yosemite National Park: A 10-Year Review. Wilderness & Environmental Medicine. 2007;18(2):111–116. doi:10.1580/06-WEME-OR-022R1.1.
FULL TEXT REVIEWEDMethods: mission records, notification/scene/return time points and definitive-care facilities. Results: timing-definition paragraph reporting means of 5:00 total, 3:06 response and 1:54 transport. Limitations: inconsistent reports and absent exposure data.
Historical California rescue data. Timing denominator and variation are not separately reported; definitive care may include a clinic.
Open original source ↗ (opens in a new tab)Access, attribution & rights notes
Main text reviewed October 16, 2026. Displayed timing claims checked against the Methods, Results, and Limitations. No figure- or image-table-dependent claims added.
Fresh factual summary and original graphics. No publisher prose, figures, or tables reproduced.
Review record: 2026-10-16. Article version: 0.1.2.
2. Rauch S et al. Pre-hospital times and clinical characteristics of severe trauma patients: A comparison between mountain and urban/suburban areas. American Journal of Emergency Medicine. 2018. doi:10.1016/j.ajem.2018.01.068.
FULL TEXT REVIEWEDMaterials and methods: IATR selection and interval definitions. Results: Prehospital times and Mode of transport. Table 1, Total row: accident-to-hospital admission mean, SD, range and n.
International Alpine cohort; kept separate from the U.S. lead.
Open original source ↗ (opens in a new tab)Access, attribution & rights notes
Complete-source audit supplied October 15, 2026; existing verified extraction retained as international context.
No open reuse license verified. Original factual prose and independently drawn graphics only.
Review record: 2026-10-16. Article version: 0.1.2.
How each passage is supported
Paragraph 1 · Source finding
Methods: recorded time points and care facilities; Results: paragraph defining total, response, and transport times
Sources 1 · Version 0.1.2Paragraph 2 · Synthesis
Methods: care-facility endpoint; Results: notification-to-definitive-care definition
Sources 1 · Version 0.1.2Paragraph 3 · Source finding
Rauch: inclusion criteria; Table 1, Total row. Hung: mission selection and clock definition
Sources 2, 1 · Version 0.1.2Paragraph 4 · Synthesis
Cross-study synthesis of populations, interval definitions, dates, and observational designs
Sources 1, 2 · Version 0.1.2Paragraph 5 · MTN educational interpretation
MTN educational interpretation; hospital treatment is the planning endpoint, not an endpoint measured identically by these studies
Sources 1, 2 · Version 0.1.2