BestRaces| Distances | 12k |
| Surface | road |
| Field size | 33,000 runners |
| Founded | 1977 (49 years) |
| Elevation gain | 450 ft |
| USATF certified | Yes |
| Boston qualifier | No |
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You'll be staying with other racers
That's about 423 runners for every hotel, motel and guest house within 15 miles of the race. Race weekend goes to whoever books first.
Lodging count from OpenStreetMap, within 15 miles of the race start we have on file.
Bookings made through this map may earn BestRaces a commission. That never affects scores or rankings — how ranking works.
Race Pace Analyzer beta
Build your Lilac Bloomsday Run splits
Not a generic pace calculator — this one already knows the course. Give it your goal finish time and it returns every split to the tape, adjusted for this race's terrain and typical race-morning heat, plus a fueling plan and an honest read on whether the goal fits your fitness. Free, no signup, nothing held back.
- Already loaded
- 12K
- 450 ft of climbing · Rolling
- ≈52°F on May race mornings
| Mile | Split | Elapsed |
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Training paces for this goal
The everyday paces that build the fitness behind your goal — derived from your target with the Daniels VDOT model. Bookmark these for your next training block.
Guides, not gospel — run easy days by feel and adjust for heat, hills, and how your legs actually feel that day.
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Beta: splits are exact math on your goal time; terrain and weather notes are estimates from this race's listed data, not a forecast. Pacing is a plan, not a promise.