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BOSTON MARATHON 2025

Song Kim

Bib: 10665•F

CO

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
7:30/mi
23:17
↑ 97↓ 3451.5%
10K· 6.21 mi
7:41/mi
47:09
↑ 79↓ 1380.4%
15K· 9.32 mi
7:41/mi
1:11:00
↑ 67↓ 78
20K· 12.43 mi
8:15/mi
1:36:38
↑ 106↓ 860.1%
Half· 13.11 mi
7:30/mi
1:41:45
↑ 19↓ 370.5%
25K· 15.53 mi
7:51/mi
2:00:47
↑ 66↓ 880.2%
30K· 18.64 mi
8:15/mi
2:26:24
↑ 181↓ 1480.2%
20M
9:21/mi
2:39:06
↑ 64↓ 500.2%
21M
11:24/mi
2:50:30
↑ 106↓ 241.6%
35K· 21.75 mi
14:01/mi
3:00:59
↑ 17↓ 861.7%
23M
9:59/mi
3:13:29
↑ 23↓ 630.6%
24M
17:25/mi
3:30:54
↓ 821.3%
40K· 24.85 mi
10:39/mi
3:40:00
↓ 200.3%
25.2M
18:48/mi
3:46:29
↑ 13↓ 160.2%
Finish· 26.22 mi
8:50/mi
3:55:29
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:41:45
Pace7:46 /mi
2nd Half
Distance13.11 mi
Time2:13:44
Pace10:12 /mi
📊Positive Split: 31.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:3023:177:3023:17
7:30
-
10K
6.21 mi11:13:2247:097:3523:52
7:41
+0:11
15K
9.32 mi11:37:131:11:007:3723:51
7:41
0:00
20K
12.43 mi12:02:511:36:387:4725:38
8:15
+0:34
Half
13.11 mi12:07:581:41:457:465:07
7:30
-0:45
25K
15.53 mi12:27:002:00:477:4719:02
7:51
+0:21
30K
18.64 mi12:52:372:26:247:5125:37
8:15
+0:24
20M
20.00 mi13:05:192:39:067:5712:42
9:21
+1:06
21M
21.00 mi13:16:432:50:308:0711:24
11:24
+2:03
35K
21.75 mi13:27:123:00:598:1910:29
14:01
+2:37
23M
23.00 mi13:39:423:13:298:2512:30
9:59
-4:02
24M
24.00 mi13:57:073:30:548:4717:25
17:25
+7:26
40K
24.85 mi14:06:133:40:008:519:06
10:39
-6:46
25.2M
25.20 mi14:12:423:46:298:596:29
18:48
+8:09
Finish
26.22 mi14:21:423:55:298:599:00
8:50
-9:58

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

7:30 /mi

Average Pace

8:59 /mi

Slowest Pace

18:48 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

3:00:36

77% of race

Time at Slower Pace

54:53

23% of race

Average Pace: 8:59 /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 mi10:49:3023:177:3023:17
7:30
#12224
10K
6.21 mi11:13:2247:097:3523:52
7:41
#12935
15K
9.32 mi11:37:131:11:007:3723:51
7:41
#13026
20K
12.43 mi12:02:511:36:387:4725:38
8:15
#14062
Half
13.11 mi12:07:581:41:457:465:07
7:30
#13932
25K
15.53 mi12:27:002:00:477:4719:02
7:51
#13667
30K
18.64 mi12:52:372:26:247:5125:37
8:15
#13526
20M
20.00 mi13:05:192:39:067:5712:42
9:21
#13959
21M
21.00 mi13:16:432:50:308:0711:24
11:24
#14807
35K
21.75 mi13:27:123:00:598:1910:29
14:01
#16123
23M
23.00 mi13:39:423:13:298:2512:30
9:59
#16418
24M
24.00 mi13:57:073:30:548:4717:25
17:25
#18691
40K
24.85 mi14:06:133:40:008:519:06
10:39
#18899
25.2M
25.20 mi14:12:423:46:298:596:29
18:48
#19488
Finish
26.22 mi14:21:423:55:298:599:00
8:50
#19443
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi122242925292513299(Top 47%)3625(Top 30%)3625(Top 66%)
10K6.21 mi3.10 mi12935-7113302-3773302-37713739(Top 48%)3806(Top 31%)3806(Top 70%)
15K9.32 mi3.11 mi13026-913406-1043406-10413299(Top 47%)3625(Top 30%)3625(Top 66%)
20K12.43 mi3.11 mi14062-10364038-6324038-63216645(Top 59%)5576(Top 46%)5576(Top 102%)
Half13.11 mi0.68 mi13932+1303971+673971+6711816(Top 42%)2855(Top 23%)2855(Top 52%)
25K15.53 mi2.42 mi13667+2653857+1143857+11412788(Top 45%)3559(Top 29%)3559(Top 65%)
30K18.64 mi3.11 mi13526+1413835+223835+2213159(Top 46%)3928(Top 32%)3928(Top 72%)
20M20.00 mi1.36 mi13959-4334120-2854120-28518528(Top 65%)7021(Top 57%)7021(Top 128%)
21M21.00 mi1.00 mi14807-8484614-4944614-49422402(Top 79%)9191(Top 75%)9191(Top 168%)
35K21.75 mi0.75 mi16123-13165398-7845398-78427699(Top 98%)11954(Top 98%)11954(Top 219%)
23M23.00 mi1.25 mi16418-2955583-1855583-18520440(Top 72%)8261(Top 68%)8261(Top 151%)
24M24.00 mi1.00 mi18691-22736899-13166899-131628334(Top 100%)12205(Top 100%)12205(Top 223%)
40K24.85 mi0.85 mi18899-2087044-1457044-14522303(Top 79%)9357(Top 77%)9357(Top 171%)
25.2M25.20 mi0.35 mi19488-5897379-3357379-33528296(Top 100%)12198(Top 100%)12198(Top 223%)
Finish26.22 mi1.02 mi19443+457377+27377+218231(Top 64%)7205(Top 59%)7205(Top 132%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 47%
×21story building
+97ft-345ft

Overall

13299

Females

3625

F18-39

3625

5K→10K

3.1 - 6.2 mi

Top 48%
×5story building
+79ft-138ft

Overall

13739

Females

3806

F18-39

3806

10K→15K

6.2 - 9.3 mi

Top 47%
×3story building
+67ft-78ft

Overall

13299

Females

3625

F18-39

3625

15K→20K

9.3 - 12.4 mi

Top 59%
×5story building
+106ft-86ft

Overall

16645

Females

5576

F18-39

5576

20K→Half

12.4 - 13.1 mi

Top 42%
×2story building
+19ft-37ft

Overall

11816

Females

2855

F18-39

2855

Half→25K

13.1 - 15.5 mi

Top 45%
×4story building
+66ft-88ft

Overall

12788

Females

3559

F18-39

3559

25K→30K

15.5 - 18.6 mi

Top 46%
×9story building
+181ft-148ft

Overall

13159

Females

3928

F18-39

3928

30K→20M

18.6 - 20.0 mi

Top 65%
×5story building
+64ft-50ft

Overall

18528

Females

7021

F18-39

7021

20M→21M

20.0 - 21.0 mi

Top 79%
×8story building
+106ft-24ft

Overall

22402

Females

9191

F18-39

9191

21M→35K

21.0 - 21.8 mi

Top 98%
×7story building
+17ft-86ft

Overall

27699

Females

11954

F18-39

11954

35K→23M

21.8 - 23.0 mi

Top 72%
×5story building
+23ft-63ft

Overall

20440

Females

8261

F18-39

8261

23M→24M

23.0 - 24.0 mi

Top 100%
×6story building
+12ft-82ft

Overall

28334

Females

12205

F18-39

12205

24M→40K

24.0 - 24.9 mi

Top 79%
×1story
+6ft-20ft

Overall

22303

Females

9357

F18-39

9357

40K→25.2M

24.9 - 25.2 mi

Top 100%
×1story
+13ft-16ft

Overall

28296

Females

12198

F18-39

12198

25.2M→Finish

25.2 - 26.2 mi

Top 64%
×2story building
+22ft-21ft

Overall

18231

Females

7205

F18-39

7205

Passing Analysis

Category:
Athletes Passed
1260
Passed By
8479
Net Change
-7219
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12224
5K → 10K67778-711#12224#12935
10K → 15K176267-91#12935#13026
15K → 20K491085-1036#13026#14062
20K → Half1355+130#14062#13932
Half → 25K30944+265#13932#13667
25K → 30K298157+141#13667#13526
30K → 20M48481-433#13526#13959
20M → 21M13861-848#13959#14807
21M → 35K21318-1316#14807#16123
35K → 23M49344-295#16123#16418
23M → 24M22275-2273#16418#18691
24M → 40K32240-208#18691#18899
40K → 25.2M1590-589#18899#19488
25.2M → Finish7934+45#19488#19443
TOTALS12608479-7219
📊

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