I ran the London Marathon with the Garmin Forerunner 970 vs Coros Pace 4 — which was more accurate?
The author compared the Garmin Forerunner 970 and Coros Pace 4 during the London Marathon to evaluate their accuracy in GPS, heart rate monitoring, and race pacing. Both watches performed well, with the Garmin slightly more accurate in tracking the official marathon distance. The review highlights improvements in GPS reliability, especially in urban areas with tall buildings.
- ▪The Garmin Forerunner 970 recorded a distance closer to the official 26.219-mile marathon length compared to the Coros Pace 4.
- ▪Both watches showed strong GPS accuracy, even in challenging areas like Canary Wharf with skyscrapers.
- ▪The author used both devices throughout training and the race, noting reliable optical heart rate sensors on each model.
- ▪Mile splits on both watches closely matched course markers, though the lap counter was reset a few times for accuracy.
- ▪The Coros Pace 4 is noted for its lightweight design and value, while the Garmin Forerunner 970 is praised for its comprehensive features and premium build.
Tom's Guide files mainly under tech. We currently carry 927 of its stories.
Story provenance
Source · retrieval · rights · ranking — open for full record
inspect →
Attribution is not the same as permission. This drawer separates discovery metadata, excerpts, WeSearch-generated summaries, reuse status, and whether the publisher receives the visit. Nothing here claims a legal grant the publisher has not made.
Record
| Original publisher | Tom's Guide |
| Canonical URL | https://www.tomsguide.com/wellness/smartwatches/i-ran-the-london-marathon-with-the-garmin-forerunner-970-vs-coros-pace-4-which-was-more-accurate |
| Publication time | Tue, 28 Apr 2026 04:30:00 +0000 |
| Retrieval time | 2026-04-28T04:35:00.049Z |
| Last seen | 2026-04-28T04:35:00.049Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | k1hFaU-CI6T4 |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
Rights status (four layers)
WeSearch handling by dimension
| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
Wellness Smartwatches I ran the London Marathon with the Garmin Forerunner 970 vs Coros Pace 4 — which was more accurate? Features By Nick Harris-Fry published 28 April 2026 Both watches impressed on race day When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. (Image credit: Future) Jump to: Verdict Copy link Facebook X Reddit Email Share this article 0 Join the conversation Follow us Add us as a preferred source on Google Newsletter Subscribe to our newsletter I’ve run the London Marathon nine times and if there’s one thing I’ve learned from all those races it’s that having one of the best running watches on your wrist can help you train for and pace the event.Over the years I’ve noticed a clear improvement in the GPS accuracy on top…
Excerpt limited to ~120 words for fair-use compliance. The full article is at Tom's Guide.
Discussion
0 commentsMore from Tom's Guide
