Boston Marathon logo
BOSTON MARATHON 2025

Britany Kirkes

Bib: 3375•F

AL

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Top 11%
Gender (Female)
#0 / 12228
Top 1%
Division (F18-39)
#0 / 5469
Top 3%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:50
Rank: #3021
Start → 5K
19:50 | 6:23/mi
10K· 6.21 mi
39:27
Rank: #2732 (+289)
5K → 10K
19:37 | 6:19/mi
15K· 9.32 mi
59:20
Rank: #2778 (-46)
10K → 15K
19:53 | 6:24/mi
20K· 12.43 mi
1:19:42
Rank: #2952 (-174)
15K → 20K
20:22 | 6:33/mi
Half· 13.11 mi
1:24:10
Rank: #2994 (-42)
20K → Half
4:28 | 6:33/mi
25K· 15.53 mi
1:40:26
Rank: #3166 (-172)
Half → 25K
16:16 | 6:43/mi
30K· 18.64 mi
2:01:45
Rank: #3221 (-55)
25K → 30K
21:19 | 6:52/mi
20M
2:11:13
Rank: #3215 (+6)
30K → 20M
9:28 | 6:58/mi
21M
2:18:23
Rank: #3171 (+44)
20M → 21M
7:10 | 7:10/mi
35K· 21.75 mi
2:23:26
Rank: #3180 (-9)
21M → 35K
5:03 | 6:45/mi
23M
2:32:11
Rank: #3149 (+31)
35K → 23M
8:45 | 6:59/mi
24M
2:39:05
Rank: #3156 (-7)
23M → 24M
6:54 | 6:54/mi
40K· 24.85 mi
2:45:04
Rank: #3135 (+21)
24M → 40K
5:59 | 7:00/mi
25.2M
2:47:38
Rank: #3102 (+33)
40K → 25.2M
2:34 | 7:27/mi
Finish· 26.22 mi
2:54:35
Rank: #3142 (-40)
25.2M → Finish
6:57 | 6:49/mi

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
Time1:24:10
Pace6:25 /mi
2nd Half
Distance13.11 mi
Time1:30:25
Pace6:54 /mi
📊Positive Split: 7.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:21:3419:506:2319:50
6:23
-
10K
6.21 mi10:41:1139:276:2119:37
6:19
-0:04
15K
9.32 mi11:01:0459:206:2219:53
6:24
+0:05
20K
12.43 mi11:21:261:19:426:2520:22
6:33
+0:09
Half
13.11 mi11:25:541:24:106:254:28
6:33
0:00
25K
15.53 mi11:42:101:40:266:2816:16
6:43
+0:10
30K
18.64 mi12:03:292:01:456:3221:19
6:52
+0:09
20M
20.00 mi12:12:572:11:136:349:28
6:58
+0:06
21M
21.00 mi12:20:072:18:236:357:10
7:10
+0:12
35K
21.75 mi12:25:102:23:266:365:03
6:45
-0:25
23M
23.00 mi12:33:552:32:116:378:45
6:59
+0:14
24M
24.00 mi12:40:492:39:056:386:54
6:54
-0:05
40K
24.85 mi12:46:482:45:046:385:59
7:00
+0:06
25.2M
25.20 mi12:49:222:47:386:392:34
7:27
+0:27
Finish
26.22 mi12:56:192:54:356:406:57
6:49
-0:38

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

6:19 /mi

Average Pace

6:40 /mi

Slowest Pace

7:27 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:20:39

81% of race

Time at Steady Pace

33:56

19% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:40 /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 mi10:21:3419:506:2319:50
6:23
#3021
10K
6.21 mi10:41:1139:276:2119:37
6:19
#2732
15K
9.32 mi11:01:0459:206:2219:53
6:24
#2778
20K
12.43 mi11:21:261:19:426:2520:22
6:33
#2952
Half
13.11 mi11:25:541:24:106:254:28
6:33
#2994
25K
15.53 mi11:42:101:40:266:2816:16
6:43
#3166
30K
18.64 mi12:03:292:01:456:3221:19
6:52
#3221
20M
20.00 mi12:12:572:11:136:349:28
6:58
#3215
21M
21.00 mi12:20:072:18:236:357:10
7:10
#3171
35K
21.75 mi12:25:102:23:266:365:03
6:45
#3180
23M
23.00 mi12:33:552:32:116:378:45
6:59
#3149
24M
24.00 mi12:40:492:39:056:386:54
6:54
#3156
40K
24.85 mi12:46:482:45:046:385:59
7:00
#3135
25.2M
25.20 mi12:49:222:47:386:392:34
7:27
#3102
Finish
26.22 mi12:56:192:54:356:406:57
6:49
#3142
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi30211451452957(Top 10%)134(Top 1%)134(Top 2%)
10K6.21 mi3.10 mi2732+289124+21124+212517(Top 9%)107(Top 0.9%)107(Top 2%)
15K9.32 mi3.11 mi2778-461241242957(Top 10%)134(Top 1%)134(Top 2%)
20K12.43 mi3.11 mi2952-174133-9133-93459(Top 12%)175(Top 1%)175(Top 3%)
Half13.11 mi0.68 mi2994-42134-1134-14072(Top 14%)228(Top 2%)228(Top 4%)
25K15.53 mi2.42 mi3166-172143-9143-94228(Top 15%)288(Top 2%)288(Top 5%)
30K18.64 mi3.11 mi3221-55159-16159-163839(Top 14%)281(Top 2%)281(Top 5%)
20M20.00 mi1.36 mi3215+6162-3162-33934(Top 14%)309(Top 3%)309(Top 6%)
21M21.00 mi1.00 mi3171+44161+1161+13022(Top 11%)217(Top 2%)217(Top 4%)
35K21.75 mi0.75 mi3180-9164-3164-33858(Top 14%)368(Top 3%)368(Top 7%)
23M23.00 mi1.25 mi3149+31166-2166-23714(Top 13%)345(Top 3%)345(Top 6%)
24M24.00 mi1.00 mi3156-7168-2168-24117(Top 14%)474(Top 4%)474(Top 9%)
40K24.85 mi0.85 mi3135+21170-2170-23924(Top 14%)474(Top 4%)474(Top 9%)
25.2M25.20 mi0.35 mi3102+33171-1171-13215(Top 11%)352(Top 3%)352(Top 6%)
Finish26.22 mi1.02 mi3142-40175-4175-44639(Top 16%)734(Top 6%)734(Top 13%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 10%
×21stories
+97ft-345ft

Overall

2957

Females

134

F18-39

134

5K→10K

3.1 - 6.2 mi

Top 9%
×5stories
+79ft-138ft

Overall

2517

Females

107

F18-39

107

10K→15K

6.2 - 9.3 mi

Top 10%
×3stories
+67ft-78ft

Overall

2957

Females

134

F18-39

134

15K→20K

9.3 - 12.4 mi

Top 12%
×5stories
+106ft-86ft

Overall

3459

Females

175

F18-39

175

20K→Half

12.4 - 13.1 mi

Top 14%
×2stories
+19ft-37ft

Overall

4072

Females

228

F18-39

228

Half→25K

13.1 - 15.5 mi

Top 15%
×4stories
+66ft-88ft

Overall

4228

Females

288

F18-39

288

25K→30K

15.5 - 18.6 mi

Top 14%
×9stories
+181ft-148ft

Overall

3839

Females

281

F18-39

281

30K→20M

18.6 - 20.0 mi

Top 14%
×5stories
+64ft-50ft

Overall

3934

Females

309

F18-39

309

20M→21M

20.0 - 21.0 mi

Top 11%
×8stories
+106ft-24ft

Overall

3022

Females

217

F18-39

217

21M→35K

21.0 - 21.8 mi

Top 14%
×7stories
+17ft-86ft

Overall

3858

Females

368

F18-39

368

35K→23M

21.8 - 23.0 mi

Top 13%
×5stories
+23ft-63ft

Overall

3714

Females

345

F18-39

345

23M→24M

23.0 - 24.0 mi

Top 14%
×6stories
+12ft-82ft

Overall

4117

Females

474

F18-39

474

24M→40K

24.0 - 24.9 mi

Top 14%
×1story
+6ft-20ft

Overall

3924

Females

474

F18-39

474

40K→25.2M

24.9 - 25.2 mi

Top 11%
×1story
+13ft-16ft

Overall

3215

Females

352

F18-39

352

25.2M→Finish

25.2 - 26.2 mi

Top 16%
×2stories
+22ft-21ft

Overall

4639

Females

734

F18-39

734

Passing Analysis

Category:
Athletes Passed
925
Passed By
1046
Net Change
-121
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3021
5K → 10K32031+289#3021#2732
10K → 15K55101-46#2732#2778
15K → 20K36210-174#2778#2952
20K → Half648-42#2952#2994
Half → 25K29201-172#2994#3166
25K → 30K93148-55#3166#3221
30K → 20M5448+6#3221#3215
20M → 21M7632+44#3215#3171
21M → 35K2837-9#3171#3180
35K → 23M7443+31#3180#3149
23M → 24M3441-7#3149#3156
24M → 40K4928+21#3156#3135
40K → 25.2M385+33#3135#3102
25.2M → Finish3373-40#3102#3142
TOTALS9251046-121
📊

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