Boston Marathon logo
BOSTON MARATHON 2025

C Stephenson-Lake

Bib: 23866•F

TX

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F50-54)
#0 / 1303
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:51
Rank: #18845
Start → 5K
25:51 | 8:19/mi
10K· 6.21 mi
52:04
Rank: #19124 (-279)
5K → 10K
26:13 | 8:26/mi
15K· 9.32 mi
1:18:56
Rank: #19480 (-356)
10K → 15K
26:52 | 8:39/mi
20K· 12.43 mi
1:47:18
Rank: #20053 (-573)
15K → 20K
28:22 | 9:08/mi
Half· 13.11 mi
1:53:23
Rank: #20113 (-60)
20K → Half
6:05 | 8:55/mi
25K· 15.53 mi
2:16:24
Rank: #20522 (-409)
Half → 25K
23:01 | 9:30/mi
30K· 18.64 mi
2:47:46
Rank: #20867 (-345)
25K → 30K
31:22 | 10:06/mi
20M
3:02:08
Rank: #21055 (-188)
30K → 20M
14:22 | 10:34/mi
21M
3:13:23
Rank: #21163 (-108)
20M → 21M
11:15 | 11:15/mi
35K· 21.75 mi
3:20:26
Rank: #21108 (+55)
21M → 35K
7:03 | 9:25/mi
23M
3:34:00
Rank: #21241 (-133)
35K → 23M
13:34 | 10:50/mi
24M
3:44:21
Rank: #21310 (-69)
23M → 24M
10:21 | 10:21/mi
40K· 24.85 mi
3:53:18
Rank: #21330 (-20)
24M → 40K
8:57 | 10:28/mi
25.2M
3:57:13
Rank: #21340 (-10)
40K → 25.2M
3:55 | 11:21/mi
Finish· 26.22 mi
4:07:15
Rank: #21375 (-35)
25.2M → Finish
10:02 | 9:51/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
Time1:53:23
Pace8:39 /mi
2nd Half
Distance13.11 mi
Time2:13:52
Pace10:13 /mi
📊Positive Split: 18.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:24:3125:518:1925:51
8:19
-
10K
6.21 mi11:50:4452:048:2326:13
8:26
+0:07
15K
9.32 mi12:17:361:18:568:2826:52
8:39
+0:13
20K
12.43 mi12:45:581:47:188:3828:22
9:08
+0:29
Half
13.11 mi12:52:031:53:238:396:05
8:55
-0:13
25K
15.53 mi13:15:042:16:248:4723:01
9:30
+0:35
30K
18.64 mi13:46:262:47:469:0031:22
10:06
+0:36
20M
20.00 mi14:00:483:02:089:0614:22
10:34
+0:28
21M
21.00 mi14:12:033:13:239:1311:15
11:15
+0:41
35K
21.75 mi14:19:063:20:269:137:03
9:25
-1:50
23M
23.00 mi14:32:403:34:009:1813:34
10:50
+1:25
24M
24.00 mi14:43:013:44:219:2110:21
10:21
-0:29
40K
24.85 mi14:51:583:53:189:238:57
10:28
+0:07
25.2M
25.20 mi14:55:533:57:139:253:55
11:21
+0:53
Finish
26.22 mi15:05:554:07:159:2610:02
9:51
-1:30

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

8:19 /mi

Average Pace

9:26 /mi

Slowest Pace

11:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:53:23

46% of race

Time at Steady Pace

1:11:28

29% of race

Time at Slower Pace

1:02:24

25% of race

Average Pace: 9:26 /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 mi11:24:3125:518:1925:51
8:19
#18845
10K
6.21 mi11:50:4452:048:2326:13
8:26
#19124
15K
9.32 mi12:17:361:18:568:2826:52
8:39
#19480
20K
12.43 mi12:45:581:47:188:3828:22
9:08
#20053
Half
13.11 mi12:52:031:53:238:396:05
8:55
#20113
25K
15.53 mi13:15:042:16:248:4723:01
9:30
#20522
30K
18.64 mi13:46:262:47:469:0031:22
10:06
#20867
20M
20.00 mi14:00:483:02:089:0614:22
10:34
#21055
21M
21.00 mi14:12:033:13:239:1311:15
11:15
#21163
35K
21.75 mi14:19:063:20:269:137:03
9:25
#21108
23M
23.00 mi14:32:403:34:009:1813:34
10:50
#21241
24M
24.00 mi14:43:013:44:219:2110:21
10:21
#21310
40K
24.85 mi14:51:583:53:189:238:57
10:28
#21330
25.2M
25.20 mi14:55:533:57:139:253:55
11:21
#21340
Finish
26.22 mi15:05:554:07:159:2610:02
9:51
#21375
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi188456824682420212(Top 71%)7555(Top 62%)7555(Top 580%)
10K6.21 mi3.10 mi19124-2796973-1496973-14919454(Top 68%)7145(Top 58%)7145(Top 548%)
15K9.32 mi3.11 mi19480-3567170-1977170-19720212(Top 71%)7555(Top 62%)7555(Top 580%)
20K12.43 mi3.11 mi20053-5737503-3337503-33321607(Top 76%)8374(Top 68%)8374(Top 643%)
Half13.11 mi0.68 mi20113-607539-367539-3621514(Top 76%)8325(Top 68%)8325(Top 639%)
25K15.53 mi2.42 mi20522-4097786-2477786-24721837(Top 77%)8562(Top 70%)8562(Top 657%)
30K18.64 mi3.11 mi20867-3458020-2348020-23421894(Top 77%)8722(Top 71%)8722(Top 669%)
20M20.00 mi1.36 mi21055-1888139-1198139-11922623(Top 80%)9215(Top 75%)9215(Top 707%)
21M21.00 mi1.00 mi21163-1088209-708209-7022049(Top 78%)8995(Top 74%)8995(Top 690%)
35K21.75 mi0.75 mi21108+558196+138196+1320075(Top 71%)8025(Top 66%)8025(Top 616%)
23M23.00 mi1.25 mi21241-1338293-978293-9722837(Top 80%)9513(Top 78%)9513(Top 730%)
24M24.00 mi1.00 mi21310-698351-588351-5822403(Top 79%)9339(Top 76%)9339(Top 717%)
40K24.85 mi0.85 mi21330-208379-288379-2821844(Top 77%)9117(Top 75%)9117(Top 700%)
25.2M25.20 mi0.35 mi21340-108395-168395-1621697(Top 76%)9003(Top 74%)9003(Top 691%)
Finish26.22 mi1.02 mi21375-358432-378432-3722453(Top 79%)9396(Top 77%)9396(Top 721%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 71%
×21stories
+97ft-345ft

Overall

20212

Females

7555

F50-54

7555

5K→10K

3.1 - 6.2 mi

Top 68%
×5stories
+79ft-138ft

Overall

19454

Females

7145

F50-54

7145

10K→15K

6.2 - 9.3 mi

Top 71%
×3stories
+67ft-78ft

Overall

20212

Females

7555

F50-54

7555

15K→20K

9.3 - 12.4 mi

Top 76%
×5stories
+106ft-86ft

Overall

21607

Females

8374

F50-54

8374

20K→Half

12.4 - 13.1 mi

Top 76%
×2stories
+19ft-37ft

Overall

21514

Females

8325

F50-54

8325

Half→25K

13.1 - 15.5 mi

Top 77%
×4stories
+66ft-88ft

Overall

21837

Females

8562

F50-54

8562

25K→30K

15.5 - 18.6 mi

Top 77%
×9stories
+181ft-148ft

Overall

21894

Females

8722

F50-54

8722

30K→20M

18.6 - 20.0 mi

Top 80%
×5stories
+64ft-50ft

Overall

22623

Females

9215

F50-54

9215

20M→21M

20.0 - 21.0 mi

Top 78%
×8stories
+106ft-24ft

Overall

22049

Females

8995

F50-54

8995

21M→35K

21.0 - 21.8 mi

Top 71%
×7stories
+17ft-86ft

Overall

20075

Females

8025

F50-54

8025

35K→23M

21.8 - 23.0 mi

Top 80%
×5stories
+23ft-63ft

Overall

22837

Females

9513

F50-54

9513

23M→24M

23.0 - 24.0 mi

Top 79%
×6stories
+12ft-82ft

Overall

22403

Females

9339

F50-54

9339

24M→40K

24.0 - 24.9 mi

Top 77%
×1story
+6ft-20ft

Overall

21844

Females

9117

F50-54

9117

40K→25.2M

24.9 - 25.2 mi

Top 76%
×1story
+13ft-16ft

Overall

21697

Females

9003

F50-54

9003

25.2M→Finish

25.2 - 26.2 mi

Top 79%
×2stories
+22ft-21ft

Overall

22453

Females

9396

F50-54

9396

Passing Analysis

Category:
Athletes Passed
897
Passed By
3427
Net Change
-2530
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18845
5K → 10K155434-279#18845#19124
10K → 15K90446-356#19124#19480
15K → 20K71644-573#19480#20053
20K → Half1575-60#20053#20113
Half → 25K62471-409#20113#20522
25K → 30K126471-345#20522#20867
30K → 20M54242-188#20867#21055
20M → 21M56164-108#21055#21163
21M → 35K8631+55#21163#21108
35K → 23M54187-133#21108#21241
23M → 24M2796-69#21241#21310
24M → 40K4969-20#21310#21330
40K → 25.2M2333-10#21330#21340
25.2M → Finish2964-35#21340#21375
TOTALS8973427-2530
📊

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