Boston Marathon logo
BOSTON MARATHON 2025

Chloe Margulis

Bib: 27967•F

NY

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
29:15
Rank: #23955
Start → 5K
9:25/mi
29:15 split
10K· 6.21 mi
58:24
Rank: #23881 (+74)
5K → 10K
9:23/mi
29:09 split
15K· 9.32 mi
1:26:20
Rank: #23321 (+560)
10K → 15K
8:59/mi
27:56 split
20K· 12.43 mi
1:54:21
Rank: #22795 (+526)
15K → 20K
9:01/mi
28:01 split
Half· 13.11 mi
2:00:24
Rank: #22705 (+90)
20K → Half
8:52/mi
6:03 split
25K· 15.53 mi
2:22:20
Rank: #22297 (+408)
Half → 25K
9:03/mi
21:56 split
30K· 18.64 mi
2:51:02
Rank: #21645 (+652)
25K → 30K
9:14/mi
28:42 split
20M
3:03:48
Rank: #21410 (+235)
30K → 20M
9:24/mi
12:46 split
21M
3:13:42
Rank: #21227 (+183)
20M → 21M
9:54/mi
9:54 split
35K· 21.75 mi
3:20:17
Rank: #21079 (+148)
21M → 35K
8:48/mi
6:35 split
23M
3:32:09
Rank: #20933 (+146)
35K → 23M
9:29/mi
11:52 split
24M
3:41:27
Rank: #20851 (+82)
23M → 24M
9:18/mi
9:18 split
40K· 24.85 mi
3:49:38
Rank: #20774 (+77)
24M → 40K
9:34/mi
8:11 split
25.2M
3:53:15
Rank: #20747 (+27)
40K → 25.2M
10:29/mi
3:37 split
Finish· 26.22 mi
4:02:33
Rank: #20715 (+32)
25.2M → Finish
9:08/mi
9:18 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
Time2:00:24
Pace9:11 /mi
2nd Half
Distance13.11 mi
Time2:02:09
Pace9:19 /mi
📊Positive Split: 1.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:46:1329:159:2529:15
9:25
-
10K
6.21 mi12:15:2258:249:2429:09
9:23
-0:02
15K
9.32 mi12:43:181:26:209:1627:56
8:59
-0:24
20K
12.43 mi13:11:191:54:219:1228:01
9:01
+0:02
Half
13.11 mi13:17:222:00:249:116:03
8:52
-0:09
25K
15.53 mi13:39:182:22:209:1021:56
9:03
+0:11
30K
18.64 mi14:08:002:51:029:1128:42
9:14
+0:11
20M
20.00 mi14:20:463:03:489:1112:46
9:24
+0:10
21M
21.00 mi14:30:403:13:429:139:54
9:54
+0:30
35K
21.75 mi14:37:153:20:179:136:35
8:48
-1:06
23M
23.00 mi14:49:073:32:099:1311:52
9:29
+0:41
24M
24.00 mi14:58:253:41:279:149:18
9:18
-0:11
40K
24.85 mi15:06:363:49:389:148:11
9:34
+0:16
25.2M
25.20 mi15:10:133:53:159:153:37
10:29
+0:55
Finish
26.22 mi15:19:314:02:339:159:18
9:08
-1:21

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

8:48 /mi

Average Pace

9:15 /mi

Slowest Pace

10:29 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:49:02

94% of race

Time at Steady Pace

9:54

4% of race

Time at Slower Pace

3:37

1% of race

Average Pace: 9:15 /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 mi11:46:1329:159:2529:15
9:25
#23955
10K
6.21 mi12:15:2258:249:2429:09
9:23
#23881
15K
9.32 mi12:43:181:26:209:1627:56
8:59
#23321
20K
12.43 mi13:11:191:54:219:1228:01
9:01
#22795
Half
13.11 mi13:17:222:00:249:116:03
8:52
#22705
25K
15.53 mi13:39:182:22:209:1021:56
9:03
#22297
30K
18.64 mi14:08:002:51:029:1128:42
9:14
#21645
20M
20.00 mi14:20:463:03:489:1112:46
9:24
#21410
21M
21.00 mi14:30:403:13:429:139:54
9:54
#21227
35K
21.75 mi14:37:153:20:179:136:35
8:48
#21079
23M
23.00 mi14:49:073:32:099:1311:52
9:29
#20933
24M
24.00 mi14:58:253:41:279:149:18
9:18
#20851
40K
24.85 mi15:06:363:49:389:148:11
9:34
#20774
25.2M
25.20 mi15:10:133:53:159:153:37
10:29
#20747
Finish
26.22 mi15:19:314:02:339:159:18
9:08
#20715
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi239559675967521995(Top 77%)8546(Top 70%)8546(Top 156%)
10K6.21 mi3.10 mi23881+749620+559620+5523781(Top 84%)9553(Top 78%)9553(Top 175%)
15K9.32 mi3.11 mi23321+5609301+3199301+31921995(Top 77%)8546(Top 70%)8546(Top 156%)
20K12.43 mi3.11 mi22795+5269004+2979004+29721075(Top 74%)8103(Top 66%)8103(Top 148%)
Half13.11 mi0.68 mi22705+908960+448960+4421269(Top 75%)8183(Top 67%)8183(Top 150%)
25K15.53 mi2.42 mi22297+4088761+1998761+19920123(Top 71%)7604(Top 62%)7604(Top 139%)
30K18.64 mi3.11 mi21645+6528427+3348427+33418845(Top 66%)7040(Top 58%)7040(Top 129%)
20M20.00 mi1.36 mi21410+2358332+958332+9518747(Top 66%)7137(Top 58%)7137(Top 130%)
21M21.00 mi1.00 mi21227+1838245+878245+8717931(Top 63%)6761(Top 55%)6761(Top 124%)
35K21.75 mi0.75 mi21079+1488178+678178+6717312(Top 61%)6547(Top 54%)6547(Top 120%)
23M23.00 mi1.25 mi20933+1468128+508128+5018615(Top 66%)7308(Top 60%)7308(Top 134%)
24M24.00 mi1.00 mi20851+828098+308098+3018846(Top 66%)7471(Top 61%)7471(Top 137%)
40K24.85 mi0.85 mi20774+778073+258073+2519020(Top 67%)7645(Top 63%)7645(Top 140%)
25.2M25.20 mi0.35 mi20747+278069+48069+419009(Top 67%)7648(Top 63%)7648(Top 140%)
Finish26.22 mi1.02 mi20715+328063+68063+619655(Top 69%)7952(Top 65%)7952(Top 145%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 77%
×21story building
+97ft-345ft

Overall

21995

Females

8546

F18-39

8546

5K→10K

3.1 - 6.2 mi

Top 84%
×5story building
+79ft-138ft

Overall

23781

Females

9553

F18-39

9553

10K→15K

6.2 - 9.3 mi

Top 77%
×3story building
+67ft-78ft

Overall

21995

Females

8546

F18-39

8546

15K→20K

9.3 - 12.4 mi

Top 74%
×5story building
+106ft-86ft

Overall

21075

Females

8103

F18-39

8103

20K→Half

12.4 - 13.1 mi

Top 75%
×2story building
+19ft-37ft

Overall

21269

Females

8183

F18-39

8183

Half→25K

13.1 - 15.5 mi

Top 71%
×4story building
+66ft-88ft

Overall

20123

Females

7604

F18-39

7604

25K→30K

15.5 - 18.6 mi

Top 66%
×9story building
+181ft-148ft

Overall

18845

Females

7040

F18-39

7040

30K→20M

18.6 - 20.0 mi

Top 66%
×5story building
+64ft-50ft

Overall

18747

Females

7137

F18-39

7137

20M→21M

20.0 - 21.0 mi

Top 63%
×8story building
+106ft-24ft

Overall

17931

Females

6761

F18-39

6761

21M→35K

21.0 - 21.8 mi

Top 61%
×7story building
+17ft-86ft

Overall

17312

Females

6547

F18-39

6547

35K→23M

21.8 - 23.0 mi

Top 66%
×5story building
+23ft-63ft

Overall

18615

Females

7308

F18-39

7308

23M→24M

23.0 - 24.0 mi

Top 66%
×6story building
+12ft-82ft

Overall

18846

Females

7471

F18-39

7471

24M→40K

24.0 - 24.9 mi

Top 67%
×1story
+6ft-20ft

Overall

19020

Females

7645

F18-39

7645

40K→25.2M

24.9 - 25.2 mi

Top 67%
×1story
+13ft-16ft

Overall

19009

Females

7648

F18-39

7648

25.2M→Finish

25.2 - 26.2 mi

Top 69%
×2story building
+22ft-21ft

Overall

19655

Females

7952

F18-39

7952

Passing Analysis

Category:
Athletes Passed
3603
Passed By
363
Net Change
+3240
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23955
5K → 10K279205+74#23955#23881
10K → 15K57414+560#23881#23321
15K → 20K5337+526#23321#22795
20K → Half944+90#22795#22705
Half → 25K41810+408#22705#22297
25K → 30K6575+652#22297#21645
30K → 20M24712+235#21645#21410
20M → 21M19411+183#21410#21227
21M → 35K1502+148#21227#21079
35K → 23M16216+146#21079#20933
23M → 24M10321+82#20933#20851
24M → 40K9215+77#20851#20774
40K → 25.2M4013+27#20774#20747
25.2M → Finish6028+32#20747#20715
TOTALS3603363+3240
📊

Passing Visuals

Category:
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