Boston Marathon logo
BOSTON MARATHON 2025

Kim Callaway

Bib: 26843•F

NC

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

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
31:34
Rank: #25976
Start → 5K
10:10/mi
31:34 split
10K· 6.21 mi
1:00:26
Rank: #24800 (+1176)
5K → 10K
9:17/mi
28:52 split
15K· 9.32 mi
1:29:41
Rank: #24368 (+432)
10K → 15K
9:25/mi
29:15 split
20K· 12.43 mi
1:58:51
Rank: #23912 (+456)
15K → 20K
9:23/mi
29:10 split
Half· 13.11 mi
2:04:56
Rank: #23818 (+94)
20K → Half
8:55/mi
6:05 split
25K· 15.53 mi
2:28:46
Rank: #23632 (+186)
Half → 25K
9:50/mi
23:50 split
30K· 18.64 mi
3:00:28
Rank: #23346 (+286)
25K → 30K
10:12/mi
31:42 split
20M
3:14:01
Rank: #23156 (+190)
30K → 20M
9:58/mi
13:33 split
21M
3:24:57
Rank: #23039 (+117)
20M → 21M
10:56/mi
10:56 split
35K· 21.75 mi
3:31:48
Rank: #22914 (+125)
21M → 35K
9:09/mi
6:51 split
23M
3:44:30
Rank: #22789 (+125)
35K → 23M
10:09/mi
12:42 split
24M
3:54:01
Rank: #22641 (+148)
23M → 24M
9:31/mi
9:31 split
40K· 24.85 mi
4:02:57
Rank: #22604 (+37)
24M → 40K
10:27/mi
8:56 split
25.2M
4:06:34
Rank: #22561 (+43)
40K → 25.2M
10:29/mi
3:37 split
Finish· 26.22 mi
4:16:06
Rank: #22490 (+71)
25.2M → Finish
9:21/mi
9:32 split

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:04:56
Pace9:32 /mi
2nd Half
Distance13.11 mi
Time2:11:10
Pace10:00 /mi
📊Positive Split: 5.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:47:3631:3410:1031:34
10:10
-
10K
6.21 mi12:16:281:00:269:4428:52
9:17
-0:53
15K
9.32 mi12:45:431:29:419:3729:15
9:25
+0:08
20K
12.43 mi13:14:531:58:519:3429:10
9:23
-0:02
Half
13.11 mi13:20:582:04:569:326:05
8:55
-0:28
25K
15.53 mi13:44:482:28:469:3523:50
9:50
+0:55
30K
18.64 mi14:16:303:00:289:4131:42
10:12
+0:22
20M
20.00 mi14:30:033:14:019:4213:33
9:58
-0:14
21M
21.00 mi14:40:593:24:579:4610:56
10:56
+0:58
35K
21.75 mi14:47:503:31:489:446:51
9:09
-1:47
23M
23.00 mi15:00:323:44:309:4612:42
10:09
+1:00
24M
24.00 mi15:10:033:54:019:459:31
9:31
-0:38
40K
24.85 mi15:18:594:02:579:468:56
10:27
+0:56
25.2M
25.20 mi15:22:364:06:349:473:37
10:29
+0:02
Finish
26.22 mi15:32:084:16:069:469:32
9:21
-1:08

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

8:55 /mi

Average Pace

9:46 /mi

Slowest Pace

10:56 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:59:16

47% of race

Time at Steady Pace

37:23

15% of race

Time at Slower Pace

1:39:27

39% of race

Average Pace: 9:46 /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 mi11:47:3631:3410:1031:34
10:10
#25976
10K
6.21 mi12:16:281:00:269:4428:52
9:17
#24800
15K
9.32 mi12:45:431:29:419:3729:15
9:25
#24368
20K
12.43 mi13:14:531:58:519:3429:10
9:23
#23912
Half
13.11 mi13:20:582:04:569:326:05
8:55
#23818
25K
15.53 mi13:44:482:28:469:3523:50
9:50
#23632
30K
18.64 mi14:16:303:00:289:4131:42
10:12
#23346
20M
20.00 mi14:30:033:14:019:4213:33
9:58
#23156
21M
21.00 mi14:40:593:24:579:4610:56
10:56
#23039
35K
21.75 mi14:47:503:31:489:446:51
9:09
#22914
23M
23.00 mi15:00:323:44:309:4612:42
10:09
#22789
24M
24.00 mi15:10:033:54:019:459:31
9:31
#22641
40K
24.85 mi15:18:594:02:579:468:56
10:27
#22604
25.2M
25.20 mi15:22:364:06:349:473:37
10:29
#22561
Finish
26.22 mi15:32:084:16:069:469:32
9:21
#22490
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi25976107431074323521(Top 83%)9389(Top 77%)9389(Top 172%)
10K6.21 mi3.10 mi24800+117610121+62210121+62223501(Top 83%)9412(Top 77%)9412(Top 172%)
15K9.32 mi3.11 mi24368+4329885+2369885+23623521(Top 83%)9389(Top 77%)9389(Top 172%)
20K12.43 mi3.11 mi23912+4569644+2419644+24122546(Top 79%)8888(Top 73%)8888(Top 163%)
Half13.11 mi0.68 mi23818+949589+559589+5521520(Top 76%)8331(Top 68%)8331(Top 152%)
25K15.53 mi2.42 mi23632+1869498+919498+9122847(Top 80%)9112(Top 75%)9112(Top 167%)
30K18.64 mi3.11 mi23346+2869374+1249374+12422197(Top 78%)8874(Top 73%)8874(Top 162%)
20M20.00 mi1.36 mi23156+1909289+859289+8520861(Top 73%)8285(Top 68%)8285(Top 151%)
21M21.00 mi1.00 mi23039+1179247+429247+4221225(Top 75%)8574(Top 70%)8574(Top 157%)
35K21.75 mi0.75 mi22914+1259195+529195+5219032(Top 67%)7483(Top 61%)7483(Top 137%)
23M23.00 mi1.25 mi22789+1259148+479148+4720957(Top 74%)8534(Top 70%)8534(Top 156%)
24M24.00 mi1.00 mi22641+1489097+519097+5119699(Top 69%)7938(Top 65%)7938(Top 145%)
40K24.85 mi0.85 mi22604+379089+89089+821789(Top 77%)9086(Top 74%)9086(Top 166%)
25.2M25.20 mi0.35 mi22561+439071+189071+1819032(Top 67%)7671(Top 63%)7671(Top 140%)
Finish26.22 mi1.02 mi22490+719053+189053+1820634(Top 73%)8466(Top 69%)8466(Top 155%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 83%
×21stories
+97ft-345ft

Overall

23521

Females

9389

F18-39

9389

5K→10K

3.1 - 6.2 mi

Top 83%
×5stories
+79ft-138ft

Overall

23501

Females

9412

F18-39

9412

10K→15K

6.2 - 9.3 mi

Top 83%
×3stories
+67ft-78ft

Overall

23521

Females

9389

F18-39

9389

15K→20K

9.3 - 12.4 mi

Top 79%
×5stories
+106ft-86ft

Overall

22546

Females

8888

F18-39

8888

20K→Half

12.4 - 13.1 mi

Top 76%
×2stories
+19ft-37ft

Overall

21520

Females

8331

F18-39

8331

Half→25K

13.1 - 15.5 mi

Top 80%
×4stories
+66ft-88ft

Overall

22847

Females

9112

F18-39

9112

25K→30K

15.5 - 18.6 mi

Top 78%
×9stories
+181ft-148ft

Overall

22197

Females

8874

F18-39

8874

30K→20M

18.6 - 20.0 mi

Top 73%
×5stories
+64ft-50ft

Overall

20861

Females

8285

F18-39

8285

20M→21M

20.0 - 21.0 mi

Top 75%
×8stories
+106ft-24ft

Overall

21225

Females

8574

F18-39

8574

21M→35K

21.0 - 21.8 mi

Top 67%
×7stories
+17ft-86ft

Overall

19032

Females

7483

F18-39

7483

35K→23M

21.8 - 23.0 mi

Top 74%
×5stories
+23ft-63ft

Overall

20957

Females

8534

F18-39

8534

23M→24M

23.0 - 24.0 mi

Top 69%
×6stories
+12ft-82ft

Overall

19699

Females

7938

F18-39

7938

24M→40K

24.0 - 24.9 mi

Top 77%
×1story
+6ft-20ft

Overall

21789

Females

9086

F18-39

9086

40K→25.2M

24.9 - 25.2 mi

Top 67%
×1story
+13ft-16ft

Overall

19032

Females

7671

F18-39

7671

25.2M→Finish

25.2 - 26.2 mi

Top 73%
×2stories
+22ft-21ft

Overall

20634

Females

8466

F18-39

8466

Passing Analysis

Category:
Athletes Passed
3668
Passed By
182
Net Change
+3486
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#25976
5K → 10K11782+1176#25976#24800
10K → 15K44412+432#24800#24368
15K → 20K4604+456#24368#23912
20K → Half951+94#23912#23818
Half → 25K21933+186#23818#23632
25K → 30K33347+286#23632#23346
30K → 20M1977+190#23346#23156
20M → 21M13417+117#23156#23039
21M → 35K1272+125#23039#22914
35K → 23M13510+125#22914#22789
23M → 24M1502+148#22789#22641
24M → 40K5720+37#22641#22604
40K → 25.2M474+43#22604#22561
25.2M → Finish9221+71#22561#22490
TOTALS3668182+3486
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing