Flat grade share
- MountainOne Steel Rail Races (Adams) Marathon
- 93.7% Favoured
MountainOne Steel Rail Races (Adams) Marathon vs MountainOne Steel Rail Races (Adams) Half Marathon
A data-led head-to-head using sourced race facts and available derived figures under one published methodology.
Data current as ofMountainOne Steel Rail Races (Adams) Marathon or MountainOne Steel Rail Races (Adams) Half Marathon — which comes out ahead?
MountainOne Steel Rail Races (Adams) Marathon has the stronger available profile on flat grade share and course flatness.
Route comparison snapshot
MountainOne Steel Rail Races (Adams) Marathon
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 0.2% Favoured
- flat grade share
- 93.7% Favoured
- lower ascent
- 128 m
- climbing density
- 3.0 m/km
- net elevation
- -0 m
- maximum grade
- 6.8%
MountainOne Steel Rail Races (Adams) Half Marathon
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 0.5%
- flat grade share
- 87.5%
- lower ascent
- 114 m
- climbing density
- 5.4 m/km
- net elevation
- -0 m
- maximum grade
- 10.6%
| Metric | MountainOne Steel Rail Races (Adams) Marathon | MountainOne Steel Rail Races (Adams) Half Marathon |
|---|---|---|
| Flat grade share | 93.7% ✓ | 87.5% |
| GAP factor (% slower than flat) | 0.2% ✓ | 0.5% |
| Uphill share | 3.0% | 6.4% |
| Steep-up share | 0.1% | 1.6% |
| Downhill share | 3.3% | 6.2% |
| Total ascent (m) | 128 m | 114 m |
| Climbing density (m/km) | 3.0 m/km | 5.4 m/km |
| Longest climb length (m) | 640 m | 870 m |
| Longest climb gain (m) | 14 m | 11 m |
| Longest climb average grade | 2.1% | 1.2% |
| Total descent (m) | 128 m | 114 m |
| Net elevation (m) | -0 m | -0 m |
| Max absolute grade | 6.8% | 10.6% |
| Start elevation (m) | 243 m | 243 m |
| Finish elevation (m) | 242 m | 242 m |
| Scenic score | 100/100 | 100/100 |
| Conditions | 44/100 | 44/100 |
GAP factor (% slower than flat)
- MountainOne Steel Rail Races (Adams) Marathon
- 0.2% Favoured
Uphill share
Steep-up share
Downhill share
Total ascent (m)
Climbing density (m/km)
Longest climb length (m)
Longest climb gain (m)
Longest climb average grade
Total descent (m)
Net elevation (m)
Max absolute grade
Start elevation (m)
Finish elevation (m)
Scenic score
Conditions
Only metrics available for at least one side are shown. A ✓ marks the better value for each metric (higher-is-better aware). Scores are out of 100 when available. Ascent, climbing density, max absolute grade and median finish describe course or field context and are not marked as better or worse.
Same-distance comparisons are most meaningful; cross-distance metrics are contextual.
Race facts that change the decision
| Fact | MountainOne Steel Rail Races (Adams) Marathon | MountainOne Steel Rail Races (Adams) Half Marathon |
|---|---|---|
| Schedule | Exact race date not confirmed. Event weekend starts 2026-05-17 (legacy event-level date). | Exact race date not confirmed. Event weekend starts 2026-05-17 (legacy event-level date). |
| Location | Adams, Massachusetts | Adams, Massachusetts |
| Actual distance | 42.2 km | 21.1 km |
| raceindex.org mapped route held | Held | Held |
| raceindex.org elevation profile held | Held | Held |
| Course type | Out And Back | Out And Back |
| Surface | Paved rail trail (10 Foot Wide paved former railroad bed) | Paved rail trail (10 Foot Wide paved former railroad bed) |
| Elevation character | Flat | Unavailable |
| Terrain | Towpath, Trail | Trail |
| Scenery | Countryside, Waterfront, Lakeside, Riverside, Mountain, Forest | Countryside, Waterfront, Lakeside, Riverside, Mountain, Forest |
| Atmosphere | Community, Competitive, Destination | Community, Competitive, Destination |
| Technicality | Non Technical | Unavailable |
| Total ascent | 128 m | 114 m |
| Climbing density | 3.0 m/km | 5.4 m/km |
| Total descent | 128 m | 114 m |
| Net elevation | -0 m | -0 m |
| Max absolute grade | 6.8% | 10.6% |
| Flat grade share | 93.7% | 87.5% |
| GAP factor | 0.2% | 0.5% |
| Entry model | Open | Open |
| Qualifying status | Boston_equivalent | Unavailable |
Schedule
- MountainOne Steel Rail Races (Adams) Marathon
Exact race date not confirmed. Event weekend starts 2026-05-17 (legacy event-level date).
- MountainOne Steel Rail Races (Adams) Half Marathon
Exact race date not confirmed. Event weekend starts 2026-05-17 (legacy event-level date).
Location
- MountainOne Steel Rail Races (Adams) Marathon
- Adams, Massachusetts
- MountainOne Steel Rail Races (Adams) Half Marathon
- Adams, Massachusetts
Actual distance
- MountainOne Steel Rail Races (Adams) Marathon
- 42.2 km
- MountainOne Steel Rail Races (Adams) Half Marathon
- 21.1 km
raceindex.org mapped route held
- MountainOne Steel Rail Races (Adams) Marathon
- Held
- MountainOne Steel Rail Races (Adams) Half Marathon
- Held
raceindex.org elevation profile held
- MountainOne Steel Rail Races (Adams) Marathon
- Held
- MountainOne Steel Rail Races (Adams) Half Marathon
- Held
Course type
- MountainOne Steel Rail Races (Adams) Marathon
- Out And Back
- MountainOne Steel Rail Races (Adams) Half Marathon
- Out And Back
Surface
- MountainOne Steel Rail Races (Adams) Marathon
- Paved rail trail (10 Foot Wide paved former railroad bed)
- MountainOne Steel Rail Races (Adams) Half Marathon
- Paved rail trail (10 Foot Wide paved former railroad bed)
Elevation character
- MountainOne Steel Rail Races (Adams) Marathon
- Flat
- MountainOne Steel Rail Races (Adams) Half Marathon
- Unavailable
Terrain
- MountainOne Steel Rail Races (Adams) Marathon
- Towpath, Trail
- MountainOne Steel Rail Races (Adams) Half Marathon
- Trail
Scenery
- MountainOne Steel Rail Races (Adams) Marathon
- Countryside, Waterfront, Lakeside, Riverside, Mountain, Forest
- MountainOne Steel Rail Races (Adams) Half Marathon
- Countryside, Waterfront, Lakeside, Riverside, Mountain, Forest
Atmosphere
- MountainOne Steel Rail Races (Adams) Marathon
- Community, Competitive, Destination
- MountainOne Steel Rail Races (Adams) Half Marathon
- Community, Competitive, Destination
Technicality
- MountainOne Steel Rail Races (Adams) Marathon
- Non Technical
- MountainOne Steel Rail Races (Adams) Half Marathon
- Unavailable
Total ascent
- MountainOne Steel Rail Races (Adams) Marathon
- 128 m
- MountainOne Steel Rail Races (Adams) Half Marathon
- 114 m
Climbing density
- MountainOne Steel Rail Races (Adams) Marathon
- 3.0 m/km
- MountainOne Steel Rail Races (Adams) Half Marathon
- 5.4 m/km
Total descent
- MountainOne Steel Rail Races (Adams) Marathon
- 128 m
- MountainOne Steel Rail Races (Adams) Half Marathon
- 114 m
Net elevation
- MountainOne Steel Rail Races (Adams) Marathon
- -0 m
- MountainOne Steel Rail Races (Adams) Half Marathon
- -0 m
Max absolute grade
- MountainOne Steel Rail Races (Adams) Marathon
- 6.8%
- MountainOne Steel Rail Races (Adams) Half Marathon
- 10.6%
Flat grade share
- MountainOne Steel Rail Races (Adams) Marathon
- 93.7%
- MountainOne Steel Rail Races (Adams) Half Marathon
- 87.5%
GAP factor
- MountainOne Steel Rail Races (Adams) Marathon
- 0.2%
- MountainOne Steel Rail Races (Adams) Half Marathon
- 0.5%
Entry model
- MountainOne Steel Rail Races (Adams) Marathon
- Open
- MountainOne Steel Rail Races (Adams) Half Marathon
- Open
Qualifying status
- MountainOne Steel Rail Races (Adams) Marathon
- Boston_equivalent
- MountainOne Steel Rail Races (Adams) Half Marathon
- Unavailable
Facts are shown only when they exist in the sourced race record; Not held means no sourced value is held for that race.
Common questions
Which is flatter, MountainOne Steel Rail Races (Adams) Marathon or MountainOne Steel Rail Races (Adams) Half Marathon?
MountainOne Steel Rail Races (Adams) Marathon has the lower GAP factor, making it the flatter course on our route model and more favourable on gradient alone.