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BOSTON MARATHON 2025

Hyejin Lee

Bib: 15481•F

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Division (F18-39)
#0 / 5469
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
8:15/mi
25:38
↑ 97↓ 3451.5%
10K· 6.21 mi
8:28/mi
51:56
↑ 79↓ 1380.4%
15K· 9.32 mi
8:39/mi
1:18:48
↑ 67↓ 78
20K· 12.43 mi
8:56/mi
1:46:33
↑ 106↓ 860.1%
Half· 13.11 mi
8:33/mi
1:52:23
↑ 19↓ 370.5%
25K· 15.53 mi
9:23/mi
2:15:07
↑ 66↓ 880.2%
30K· 18.64 mi
10:14/mi
2:46:55
↑ 181↓ 1480.2%
20M
10:28/mi
3:01:08
↑ 64↓ 500.2%
21M
11:33/mi
3:12:41
↑ 106↓ 241.6%
35K· 21.75 mi
10:46/mi
3:20:44
↑ 17↓ 861.7%
23M
10:19/mi
3:33:39
↑ 23↓ 630.6%
24M
9:55/mi
3:43:34
↓ 821.3%
40K· 24.85 mi
10:27/mi
3:52:30
↓ 200.3%
25.2M
11:27/mi
3:56:27
↑ 13↓ 160.2%
Finish· 26.22 mi
9:36/mi
4:06:14
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:52:23
Pace8:34 /mi
2nd Half
Distance13.11 mi
Time2:13:51
Pace10:13 /mi
📊Positive Split: 19.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:57:4925:388:1525:38
8:15
-
10K
6.21 mi11:24:0751:568:2126:18
8:28
+0:13
15K
9.32 mi11:50:591:18:488:2726:52
8:39
+0:11
20K
12.43 mi12:18:441:46:338:3427:45
8:56
+0:17
Half
13.11 mi12:24:341:52:238:345:50
8:33
-0:23
25K
15.53 mi12:47:182:15:078:4222:44
9:23
+0:50
30K
18.64 mi13:19:062:46:558:5731:48
10:14
+0:51
20M
20.00 mi13:33:193:01:089:0314:13
10:28
+0:14
21M
21.00 mi13:44:523:12:419:1111:33
11:33
+1:05
35K
21.75 mi13:52:553:20:449:148:03
10:46
-0:47
23M
23.00 mi14:05:503:33:399:1712:55
10:19
-0:27
24M
24.00 mi14:15:453:43:349:199:55
9:55
-0:24
40K
24.85 mi14:24:413:52:309:218:56
10:27
+0:32
25.2M
25.20 mi14:28:383:56:279:233:57
11:27
+1:00
Finish
26.22 mi14:38:254:06:149:249:47
9:36
-1:51

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

8:15 /mi

Average Pace

9:24 /mi

Slowest Pace

11:33 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:15:07

55% of race

Time at Steady Pace

1:04:25

26% of race

Time at Slower Pace

46:42

19% of race

Average Pace: 9:23 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:57:4925:388:1525:38
8:15
#18439
10K
6.21 mi11:24:0751:568:2126:18
8:28
#18990
15K
9.32 mi11:50:591:18:488:2726:52
8:39
#19387
20K
12.43 mi12:18:441:46:338:3427:45
8:56
#19736
Half
13.11 mi12:24:341:52:238:345:50
8:33
#19726
25K
15.53 mi12:47:182:15:078:4222:44
9:23
#20055
30K
18.64 mi13:19:062:46:558:5731:48
10:14
#20656
20M
20.00 mi13:33:193:01:089:0314:13
10:28
#20828
21M
21.00 mi13:44:523:12:419:1111:33
11:33
#21000
35K
21.75 mi13:52:553:20:449:148:03
10:46
#21162
23M
23.00 mi14:05:503:33:399:1712:55
10:19
#21179
24M
24.00 mi14:15:453:43:349:199:55
9:55
#21191
40K
24.85 mi14:24:413:52:309:218:56
10:27
#21208
25.2M
25.20 mi14:28:383:56:279:233:57
11:27
#21217
Finish
26.22 mi14:38:254:06:149:249:47
9:36
#21223
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi184396604660420211(Top 71%)7554(Top 62%)7554(Top 138%)
10K6.21 mi3.10 mi18990-5516898-2946898-29419616(Top 69%)7249(Top 59%)7249(Top 133%)
15K9.32 mi3.11 mi19387-3977118-2207118-22020211(Top 71%)7554(Top 62%)7554(Top 138%)
20K12.43 mi3.11 mi19736-3497325-2077325-20720640(Top 73%)7860(Top 64%)7860(Top 144%)
Half13.11 mi0.68 mi19726+107322+37322+319602(Top 69%)7258(Top 59%)7258(Top 133%)
25K15.53 mi2.42 mi20055-3297517-1957517-19521465(Top 76%)8340(Top 68%)8340(Top 152%)
30K18.64 mi3.11 mi20656-6017905-3887905-38822266(Top 78%)8916(Top 73%)8916(Top 163%)
20M20.00 mi1.36 mi20828-1728012-1078012-10722317(Top 79%)9067(Top 74%)9067(Top 166%)
21M21.00 mi1.00 mi21000-1728119-1078119-10722718(Top 80%)9351(Top 76%)9351(Top 171%)
35K21.75 mi0.75 mi21162-1628223-1048223-10423728(Top 84%)9905(Top 81%)9905(Top 181%)
23M23.00 mi1.25 mi21179-178257-348257-3421484(Top 76%)8804(Top 72%)8804(Top 161%)
24M24.00 mi1.00 mi21191-128286-298286-2921124(Top 74%)8669(Top 71%)8669(Top 159%)
40K24.85 mi0.85 mi21208-178316-308316-3021783(Top 77%)9080(Top 74%)9080(Top 166%)
25.2M25.20 mi0.35 mi21217-98330-148330-1421955(Top 77%)9127(Top 75%)9127(Top 167%)
Finish26.22 mi1.02 mi21223-68345-158345-1521565(Top 76%)8941(Top 73%)8941(Top 163%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 71%
×21story building
+97ft-345ft

Overall

20211

Females

7554

F18-39

7554

5K→10K

3.1 - 6.2 mi

Top 69%
×5story building
+79ft-138ft

Overall

19616

Females

7249

F18-39

7249

10K→15K

6.2 - 9.3 mi

Top 71%
×3story building
+67ft-78ft

Overall

20211

Females

7554

F18-39

7554

15K→20K

9.3 - 12.4 mi

Top 73%
×5story building
+106ft-86ft

Overall

20640

Females

7860

F18-39

7860

20K→Half

12.4 - 13.1 mi

Top 69%
×2story building
+19ft-37ft

Overall

19602

Females

7258

F18-39

7258

Half→25K

13.1 - 15.5 mi

Top 76%
×4story building
+66ft-88ft

Overall

21465

Females

8340

F18-39

8340

25K→30K

15.5 - 18.6 mi

Top 78%
×9story building
+181ft-148ft

Overall

22266

Females

8916

F18-39

8916

30K→20M

18.6 - 20.0 mi

Top 79%
×5story building
+64ft-50ft

Overall

22317

Females

9067

F18-39

9067

20M→21M

20.0 - 21.0 mi

Top 80%
×8story building
+106ft-24ft

Overall

22718

Females

9351

F18-39

9351

21M→35K

21.0 - 21.8 mi

Top 84%
×7story building
+17ft-86ft

Overall

23728

Females

9905

F18-39

9905

35K→23M

21.8 - 23.0 mi

Top 76%
×5story building
+23ft-63ft

Overall

21484

Females

8804

F18-39

8804

23M→24M

23.0 - 24.0 mi

Top 74%
×6story building
+12ft-82ft

Overall

21124

Females

8669

F18-39

8669

24M→40K

24.0 - 24.9 mi

Top 77%
×1story
+6ft-20ft

Overall

21783

Females

9080

F18-39

9080

40K→25.2M

24.9 - 25.2 mi

Top 77%
×1story
+13ft-16ft

Overall

21955

Females

9127

F18-39

9127

25.2M→Finish

25.2 - 26.2 mi

Top 76%
×2story building
+22ft-21ft

Overall

21565

Females

8941

F18-39

8941

Passing Analysis

Category:
Athletes Passed
839
Passed By
3623
Net Change
-2784
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18439
5K → 10K92643-551#18439#18990
10K → 15K83480-397#18990#19387
15K → 20K98447-349#19387#19736
20K → Half3323+10#19736#19726
Half → 25K72401-329#19726#20055
25K → 30K94695-601#20055#20656
30K → 20M56228-172#20656#20828
20M → 21M41213-172#20828#21000
21M → 35K27189-162#21000#21162
35K → 23M8198-17#21162#21179
23M → 24M5668-12#21179#21191
24M → 40K4461-17#21191#21208
40K → 25.2M2029-9#21208#21217
25.2M → Finish4248-6#21217#21223
TOTALS8393623-2784
📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing