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BOSTON MARATHON 2025

Katherine Sims

Bib: 17871•F

KY

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 30%
Gender (Female)
#0 / 12228
Top 12%
Division (F18-39)
#0 / 5469
Top 23%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:03
Rank: #11523
Start → 5K
23:03 | 7:25/mi
10K· 6.21 mi
45:32
Rank: #10574 (+949)
5K → 10K
22:29 | 7:14/mi
15K· 9.32 mi
1:08:09
Rank: #10317 (+257)
10K → 15K
22:37 | 7:17/mi
20K· 12.43 mi
1:31:04
Rank: #10114 (+203)
15K → 20K
22:55 | 7:23/mi
Half· 13.11 mi
1:36:00
Rank: #10076 (+38)
20K → Half
4:56 | 7:14/mi
25K· 15.53 mi
1:53:52
Rank: #9825 (+251)
Half → 25K
17:52 | 7:22/mi
30K· 18.64 mi
2:17:29
Rank: #9489 (+336)
25K → 30K
23:37 | 7:36/mi
20M
2:27:49
Rank: #9315 (+174)
30K → 20M
10:20 | 7:36/mi
21M
2:35:35
Rank: #9062 (+253)
20M → 21M
7:46 | 7:46/mi
35K· 21.75 mi
2:41:24
Rank: #9105 (-43)
21M → 35K
5:49 | 7:46/mi
23M
2:50:54
Rank: #8919 (+186)
35K → 23M
9:30 | 7:35/mi
24M
2:58:18
Rank: #8781 (+138)
23M → 24M
7:24 | 7:24/mi
40K· 24.85 mi
3:04:41
Rank: #8634 (+147)
24M → 40K
6:23 | 7:28/mi
25.2M
3:07:32
Rank: #8595 (+39)
40K → 25.2M
2:51 | 8:16/mi
Finish· 26.22 mi
3:14:41
Rank: #8448 (+147)
25.2M → Finish
7:09 | 7:01/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:36:00
Pace7:19 /mi
2nd Half
Distance13.11 mi
Time1:38:41
Pace7:32 /mi
📊Positive Split: 2.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:13:1623:037:2523:03
7:25
-
10K
6.21 mi11:35:4545:327:2022:29
7:14
-0:11
15K
9.32 mi11:58:221:08:097:1922:37
7:17
+0:03
20K
12.43 mi12:21:171:31:047:2022:55
7:23
+0:06
Half
13.11 mi12:26:131:36:007:194:56
7:14
-0:09
25K
15.53 mi12:44:051:53:527:2017:52
7:22
+0:08
30K
18.64 mi13:07:422:17:297:2323:37
7:36
+0:14
20M
20.00 mi13:18:022:27:497:2310:20
7:36
0:00
21M
21.00 mi13:25:482:35:357:257:46
7:46
+0:10
35K
21.75 mi13:31:372:41:247:255:49
7:46
0:00
23M
23.00 mi13:41:072:50:547:269:30
7:35
-0:11
24M
24.00 mi13:48:312:58:187:267:24
7:24
-0:11
40K
24.85 mi13:54:543:04:417:266:23
7:28
+0:04
25.2M
25.20 mi13:57:453:07:327:272:51
8:16
+0:48
Finish
26.22 mi14:04:543:14:417:267:09
7:01
-1:15

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

7:01 /mi

Average Pace

7:26 /mi

Slowest Pace

8:16 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:58:15

92% of race

Time at Steady Pace

16:26

8% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:25 /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 mi11:13:1623:037:2523:03
7:25
#11523
10K
6.21 mi11:35:4545:327:2022:29
7:14
#10574
15K
9.32 mi11:58:221:08:097:1922:37
7:17
#10317
20K
12.43 mi12:21:171:31:047:2022:55
7:23
#10114
Half
13.11 mi12:26:131:36:007:194:56
7:14
#10076
25K
15.53 mi12:44:051:53:527:2017:52
7:22
#9825
30K
18.64 mi13:07:422:17:297:2323:37
7:36
#9489
20M
20.00 mi13:18:022:27:497:2310:20
7:36
#9315
21M
21.00 mi13:25:482:35:357:257:46
7:46
#9062
35K
21.75 mi13:31:372:41:247:255:49
7:46
#9105
23M
23.00 mi13:41:072:50:547:269:30
7:35
#8919
24M
24.00 mi13:48:312:58:187:267:24
7:24
#8781
40K
24.85 mi13:54:543:04:417:266:23
7:28
#8634
25.2M
25.20 mi13:57:453:07:327:272:51
8:16
#8595
Finish
26.22 mi14:04:543:14:417:267:09
7:01
#8448
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi11523253325339838(Top 35%)1815(Top 15%)1815(Top 33%)
10K6.21 mi3.10 mi10574+9492089+4442089+4449821(Top 35%)1750(Top 14%)1750(Top 32%)
15K9.32 mi3.11 mi10317+2571981+1081981+1089838(Top 35%)1815(Top 15%)1815(Top 33%)
20K12.43 mi3.11 mi10114+2031921+601921+609698(Top 34%)1828(Top 15%)1828(Top 33%)
Half13.11 mi0.68 mi10076+381908+131908+139435(Top 33%)1678(Top 14%)1678(Top 31%)
25K15.53 mi2.42 mi9825+2511821+871821+878912(Top 31%)1596(Top 13%)1596(Top 29%)
30K18.64 mi3.11 mi9489+3361718+1031718+1038469(Top 30%)1583(Top 13%)1583(Top 29%)
20M20.00 mi1.36 mi9315+1741681+371681+377734(Top 27%)1437(Top 12%)1437(Top 26%)
21M21.00 mi1.00 mi9062+2531600+811600+816049(Top 21%)957(Top 8%)957(Top 17%)
35K21.75 mi0.75 mi9105-431647-471647-4710550(Top 37%)2901(Top 24%)2901(Top 53%)
23M23.00 mi1.25 mi8919+1861610+371610+377189(Top 25%)1480(Top 12%)1480(Top 27%)
24M24.00 mi1.00 mi8781+1381584+261584+267071(Top 25%)1485(Top 12%)1485(Top 27%)
40K24.85 mi0.85 mi8634+1471565+191565+196634(Top 23%)1399(Top 11%)1399(Top 26%)
25.2M25.20 mi0.35 mi8595+391559+61559+67503(Top 26%)1843(Top 15%)1843(Top 34%)
Finish26.22 mi1.02 mi8448+1471519+401519+405870(Top 21%)1206(Top 10%)1206(Top 22%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 35%
×21stories
+97ft-345ft

Overall

9838

Females

1815

F18-39

1815

5K→10K

3.1 - 6.2 mi

Top 35%
×5stories
+79ft-138ft

Overall

9821

Females

1750

F18-39

1750

10K→15K

6.2 - 9.3 mi

Top 35%
×3stories
+67ft-78ft

Overall

9838

Females

1815

F18-39

1815

15K→20K

9.3 - 12.4 mi

Top 34%
×5stories
+106ft-86ft

Overall

9698

Females

1828

F18-39

1828

20K→Half

12.4 - 13.1 mi

Top 33%
×2stories
+19ft-37ft

Overall

9435

Females

1678

F18-39

1678

Half→25K

13.1 - 15.5 mi

Top 31%
×4stories
+66ft-88ft

Overall

8912

Females

1596

F18-39

1596

25K→30K

15.5 - 18.6 mi

Top 30%
×9stories
+181ft-148ft

Overall

8469

Females

1583

F18-39

1583

30K→20M

18.6 - 20.0 mi

Top 27%
×5stories
+64ft-50ft

Overall

7734

Females

1437

F18-39

1437

20M→21M

20.0 - 21.0 mi

Top 21%
×8stories
+106ft-24ft

Overall

6049

Females

957

F18-39

957

21M→35K

21.0 - 21.8 mi

Top 37%
×7stories
+17ft-86ft

Overall

10550

Females

2901

F18-39

2901

35K→23M

21.8 - 23.0 mi

Top 25%
×5stories
+23ft-63ft

Overall

7189

Females

1480

F18-39

1480

23M→24M

23.0 - 24.0 mi

Top 25%
×6stories
+12ft-82ft

Overall

7071

Females

1485

F18-39

1485

24M→40K

24.0 - 24.9 mi

Top 23%
×1story
+6ft-20ft

Overall

6634

Females

1399

F18-39

1399

40K→25.2M

24.9 - 25.2 mi

Top 26%
×1story
+13ft-16ft

Overall

7503

Females

1843

F18-39

1843

25.2M→Finish

25.2 - 26.2 mi

Top 21%
×2stories
+22ft-21ft

Overall

5870

Females

1206

F18-39

1206

Passing Analysis

Category:
Athletes Passed
3559*
Passed By
483
Net Change
+3075
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11523
5K → 10K98536+949#11523#10574
10K → 15K31255+257#10574#10317
15K → 20K27975+203#10317#10114
20K → Half5113+38#10114#10076
Half → 25K291*40+251#10076#9825
25K → 30K39559+336#9825#9489
30K → 20M19824+174#9489#9315
20M → 21M2574+253#9315#9062
21M → 35K4891-43#9062#9105
35K → 23M20923+186#9105#8919
23M → 24M15820+138#8919#8781
24M → 40K16417+147#8781#8634
40K → 25.2M5415+39#8634#8595
25.2M → Finish15811+147#8595#8448
TOTALS3559*483+3075

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

Passing Visuals

Category:
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🔥Passing Intensity

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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