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BOSTON MARATHON 2025

Karin Lee

Bib: 19859•F

NY

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 47%
Masters (Masters Women)
#0 / 6759
Top 34%
Division (F45-49)
#0 / 1813
Top 43%
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
8:21/mi
25:56
↑ 97↓ 3451.5%
10K· 6.21 mi
8:25/mi
52:06
↑ 79↓ 1380.4%
15K· 9.32 mi
8:26/mi
1:18:19
↑ 67↓ 78
20K· 12.43 mi
8:38/mi
1:45:09
↑ 106↓ 860.1%
Half· 13.11 mi
8:17/mi
1:50:48
↑ 19↓ 370.5%
25K· 15.53 mi
8:22/mi
2:11:04
↑ 66↓ 880.2%
30K· 18.64 mi
8:28/mi
2:37:23
↑ 181↓ 1480.2%
20M
8:31/mi
2:48:58
↑ 64↓ 500.2%
21M
8:59/mi
2:57:57
↑ 106↓ 241.6%
35K· 21.75 mi
8:23/mi
3:04:13
↑ 17↓ 861.7%
23M
8:31/mi
3:14:53
↑ 23↓ 630.6%
24M
8:24/mi
3:23:17
↓ 821.3%
40K· 24.85 mi
8:35/mi
3:30:37
↓ 200.3%
25.2M
9:25/mi
3:33:52
↑ 13↓ 160.2%
Finish· 26.22 mi
8:21/mi
3:42:23
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:50:48
Pace8:27 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:51:35
Pace8:31 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:0925:568:2125:56
8:21
-
10K
6.21 mi11:44:1952:068:2326:10
8:25
+0:04
15K
9.32 mi12:10:321:18:198:2426:13
8:26
+0:01
20K
12.43 mi12:37:221:45:098:2826:50
8:38
+0:12
Half
13.11 mi12:43:011:50:488:275:39
8:17
-0:21
25K
15.53 mi13:03:172:11:048:2620:16
8:22
+0:05
30K
18.64 mi13:29:362:37:238:2726:19
8:28
+0:06
20M
20.00 mi13:41:112:48:588:2711:35
8:31
+0:03
21M
21.00 mi13:50:102:57:578:288:59
8:59
+0:28
35K
21.75 mi13:56:263:04:138:286:16
8:23
-0:36
23M
23.00 mi14:07:063:14:538:2810:40
8:31
+0:08
24M
24.00 mi14:15:303:23:178:288:24
8:24
-0:07
40K
24.85 mi14:22:503:30:378:287:20
8:35
+0:11
25.2M
25.20 mi14:26:053:33:528:293:15
9:25
+0:50
Finish
26.22 mi14:34:363:42:238:298:31
8:21
-1:04

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

8:17 /mi

Average Pace

8:29 /mi

Slowest Pace

9:25 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:39:08

99% of race

Time at Steady Pace

3:15

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:29 /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 mi11:18:0925:568:2125:56
8:21
#19004
10K
6.21 mi11:44:1952:068:2326:10
8:25
#19150
15K
9.32 mi12:10:321:18:198:2426:13
8:26
#19039
20K
12.43 mi12:37:221:45:098:2826:50
8:38
#19023
Half
13.11 mi12:43:011:50:488:275:39
8:17
#18971
25K
15.53 mi13:03:172:11:048:2620:16
8:22
#18517
30K
18.64 mi13:29:362:37:238:2726:19
8:28
#17746
20M
20.00 mi13:41:112:48:588:2711:35
8:31
#17447
21M
21.00 mi13:50:102:57:578:288:59
8:59
#17188
35K
21.75 mi13:56:263:04:138:286:16
8:23
#17071
23M
23.00 mi14:07:063:14:538:2810:40
8:31
#16837
24M
24.00 mi14:15:303:23:178:288:24
8:24
#16693
40K
24.85 mi14:22:503:30:378:287:20
8:35
#16568
25.2M
25.20 mi14:26:053:33:528:293:15
9:25
#16523
Finish
26.22 mi14:34:363:42:238:298:31
8:21
#16466
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi190046910691018951(Top 67%)6867(Top 56%)6867(Top 379%)
10K6.21 mi3.10 mi19150-1466985-756985-7519329(Top 68%)7066(Top 58%)7066(Top 390%)
15K9.32 mi3.11 mi19039+1116935+506935+5018951(Top 67%)6867(Top 56%)6867(Top 379%)
20K12.43 mi3.11 mi19023+166916+196916+1919059(Top 67%)6945(Top 57%)6945(Top 383%)
Half13.11 mi0.68 mi18971+526891+256891+2517847(Top 63%)6226(Top 51%)6226(Top 343%)
25K15.53 mi2.42 mi18517+4546650+2416650+24116300(Top 57%)5484(Top 45%)5484(Top 302%)
30K18.64 mi3.11 mi17746+7716257+3936257+39314593(Top 51%)4677(Top 38%)4677(Top 258%)
20M20.00 mi1.36 mi17447+2996117+1406117+14013969(Top 49%)4504(Top 37%)4504(Top 248%)
21M21.00 mi1.00 mi17188+2595985+1325985+13213442(Top 47%)4348(Top 36%)4348(Top 240%)
35K21.75 mi0.75 mi17071+1175949+365949+3614770(Top 52%)5119(Top 42%)5119(Top 282%)
23M23.00 mi1.25 mi16837+2345836+1135836+11313462(Top 47%)4514(Top 37%)4514(Top 249%)
24M24.00 mi1.00 mi16693+1445773+635773+6313933(Top 49%)4800(Top 39%)4800(Top 265%)
40K24.85 mi0.85 mi16568+1255729+445729+4413965(Top 49%)4951(Top 40%)4951(Top 273%)
25.2M25.20 mi0.35 mi16523+455712+175712+1714242(Top 50%)5162(Top 42%)5162(Top 285%)
Finish26.22 mi1.02 mi16466+575711+15711+115319(Top 54%)5652(Top 46%)5652(Top 312%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 67%
×21story building
+97ft-345ft

Overall

18951

Females

6867

F45-49

6867

5K→10K

3.1 - 6.2 mi

Top 68%
×5story building
+79ft-138ft

Overall

19329

Females

7066

F45-49

7066

10K→15K

6.2 - 9.3 mi

Top 67%
×3story building
+67ft-78ft

Overall

18951

Females

6867

F45-49

6867

15K→20K

9.3 - 12.4 mi

Top 67%
×5story building
+106ft-86ft

Overall

19059

Females

6945

F45-49

6945

20K→Half

12.4 - 13.1 mi

Top 63%
×2story building
+19ft-37ft

Overall

17847

Females

6226

F45-49

6226

Half→25K

13.1 - 15.5 mi

Top 57%
×4story building
+66ft-88ft

Overall

16300

Females

5484

F45-49

5484

25K→30K

15.5 - 18.6 mi

Top 51%
×9story building
+181ft-148ft

Overall

14593

Females

4677

F45-49

4677

30K→20M

18.6 - 20.0 mi

Top 49%
×5story building
+64ft-50ft

Overall

13969

Females

4504

F45-49

4504

20M→21M

20.0 - 21.0 mi

Top 47%
×8story building
+106ft-24ft

Overall

13442

Females

4348

F45-49

4348

21M→35K

21.0 - 21.8 mi

Top 52%
×7story building
+17ft-86ft

Overall

14770

Females

5119

F45-49

5119

35K→23M

21.8 - 23.0 mi

Top 47%
×5story building
+23ft-63ft

Overall

13462

Females

4514

F45-49

4514

23M→24M

23.0 - 24.0 mi

Top 49%
×6story building
+12ft-82ft

Overall

13933

Females

4800

F45-49

4800

24M→40K

24.0 - 24.9 mi

Top 49%
×1story
+6ft-20ft

Overall

13965

Females

4951

F45-49

4951

40K→25.2M

24.9 - 25.2 mi

Top 50%
×1story
+13ft-16ft

Overall

14242

Females

5162

F45-49

5162

25.2M→Finish

25.2 - 26.2 mi

Top 54%
×2story building
+22ft-21ft

Overall

15319

Females

5652

F45-49

5652

Passing Analysis

Category:
Athletes Passed
3367
Passed By
829
Net Change
+2538
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19004
5K → 10K185331-146#19004#19150
10K → 15K255144+111#19150#19039
15K → 20K212196+16#19039#19023
20K → Half619+52#19023#18971
Half → 25K4595+454#18971#18517
25K → 30K7776+771#18517#17746
30K → 20M3012+299#17746#17447
20M → 21M27213+259#17447#17188
21M → 35K13316+117#17188#17071
35K → 23M24713+234#17071#16837
23M → 24M16016+144#16837#16693
24M → 40K14217+125#16693#16568
40K → 25.2M5914+45#16568#16523
25.2M → Finish10447+57#16523#16466
TOTALS3367829+2538
📊

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