Glass City Marathon
Toledo, United States of America · Monday 26 April 2027
The Glass City Marathon is a long-distance road race held annually in Toledo, Ohio, first established in 1971. The inaugural event started and finished at the University of Toledo, where it remains a central feature of the race today. It was notable for the extreme heat and humidity of its first edition, with temperatures reaching 92 degrees, resulting in a significant dropout rate among participants.
Difficulty Calculator
h
:m
:s
Adjusted Time
4:31:46
Time difference: +31.8 minutes compared to a flat, road, temperate course.
Course Details
Elevation Gain126m
Elevation High207m
Elevation Low177m
Weather Forecast
High11°C
Low7°C
Chance of Rain0%
How hard is Glass City Marathon?
Very Difficultharder than 86% of marathons
Flattest / easiestHardest
On our difficulty model, Glass City Marathon plays about 34 minutes slower than an average road marathon for a 3:30 runner. It ranks #162 hardest of 1151 marathons we analyse, and #94 of 576 in United States of America. Use the calculator above to see the exact adjusted time for your own goal pace.
What will you run at Glass City Marathon?
Estimated finish times on this course versus the same effort on an average road marathon, based on its elevation, surface, and expected race-day temperature.
| Average-course time | On Glass City Marathon | Difference |
|---|---|---|
| 3:00:00 | 3:26:21 | +26:21 |
| 3:30:00 | 3:59:14 | +29:14 |
| 4:00:00 | 4:31:46 | +31:46 |
| 4:30:00 | 5:04:03 | +34:03 |
| 5:00:00 | 5:36:08 | +36:08 |
| 5:30:00 | 6:08:03 | +38:03 |
| 6:00:00 | 6:39:50 | +39:50 |
Use the calculator above for your exact goal time. Want a prediction from your own training? Try the marathon time predictor.
Glass City Marathon 2027 Course Analysis
Glass City Marathon is a full marathon held in Toledo, United States of America. It is scheduled for Monday 26 April 2027. The course is run on trail surface with 126m of total climbing, with its high point near 207m above sea level. For registration and full race details, visit the official Glass City Marathon website.
Elevation Profile
With 126m of total climbing, this is a gently undulating course. The elevation changes are manageable for most runners and shouldn't greatly affect your pacing.
Expected Race Day Weather
Based on historical weather data for April, the expected race day conditions are as follows. Near-ideal running temperatures are expected, ranging from 7°C to 11°C. This temperature range is widely considered optimal for marathon performance, allowing efficient heat dissipation without cold-related issues. There is a low chance of rain (0%), so dry conditions are likely.
Surface Type: Trail
Glass City Marathon is a trail race, meaning the course includes unpaved surfaces such as dirt, gravel, or forest paths. Trail surfaces are usually slower than the road equivalent - often by 10-20% - because of uneven footing, technical sections, and frequently steeper gradients, though a smooth, non-technical or downhill trail can run faster than that suggests. Trail-specific shoes with good grip are recommended.
Looking for an easier marathon or a tougher challenge? You can also compare Glass City Marathon against other marathons to find the right race for your goals.
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