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BOSTON MARATHON 2025

Chelsea Mestdagh

Bib: 15646•F

MI

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

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
9:39/mi
29:59
↑ 97↓ 3451.5%
10K· 6.21 mi
10:19/mi
1:02:01
↑ 79↓ 1380.4%
15K· 9.32 mi
11:07/mi
1:36:34
↑ 67↓ 78
20K· 12.43 mi
11:52/mi
2:13:25
↑ 106↓ 860.1%
Half· 13.11 mi
12:28/mi
2:21:55
↑ 19↓ 370.5%
25K· 15.53 mi
12:52/mi
2:53:06
↑ 66↓ 880.2%
30K· 18.64 mi
13:15/mi
3:34:16
↑ 181↓ 1480.2%
20M
13:07/mi
3:52:05
↑ 64↓ 500.2%
21M
13:44/mi
4:05:49
↑ 106↓ 241.6%
35K· 21.75 mi
12:50/mi
4:15:25
↑ 17↓ 861.7%
23M
13:03/mi
4:31:45
↑ 23↓ 630.6%
24M
12:36/mi
4:44:21
↓ 821.3%
40K· 24.85 mi
12:54/mi
4:55:23
↓ 200.3%
25.2M
13:55/mi
5:00:11
↑ 13↓ 160.2%
Finish· 26.22 mi
11:57/mi
5:12:22
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:21:55
Pace10:50 /mi
2nd Half
Distance13.11 mi
Time2:50:27
Pace13:00 /mi
📊Positive Split: 20.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:01:5329:599:3929:59
9:39
-
10K
6.21 mi11:33:551:02:019:5932:02
10:19
+0:40
15K
9.32 mi12:08:281:36:3410:2234:33
11:07
+0:48
20K
12.43 mi12:45:192:13:2510:4436:51
11:52
+0:45
Half
13.11 mi12:53:492:21:5510:508:30
12:28
+0:36
25K
15.53 mi13:25:002:53:0611:0931:11
12:52
+0:24
30K
18.64 mi14:06:103:34:1611:3041:10
13:15
+0:23
20M
20.00 mi14:23:593:52:0511:3617:49
13:07
-0:08
21M
21.00 mi14:37:434:05:4911:4213:44
13:44
+0:37
35K
21.75 mi14:47:194:15:2511:459:36
12:50
-0:54
23M
23.00 mi15:03:394:31:4511:4916:20
13:03
+0:13
24M
24.00 mi15:16:154:44:2111:5112:36
12:36
-0:27
40K
24.85 mi15:27:174:55:2311:5311:02
12:54
+0:18
25.2M
25.20 mi15:32:055:00:1111:554:48
13:55
+1:01
Finish
26.22 mi15:44:165:12:2211:5512:11
11:57
-1:58

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

9:39 /mi

Average Pace

11:55 /mi

Slowest Pace

13:55 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:25:36

47% of race

Time at Steady Pace

2:28:14

47% of race

Time at Slower Pace

18:32

6% of race

Average Pace: 11:55 /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 mi11:01:5329:599:3929:59
9:39
#24684
10K
6.21 mi11:33:551:02:019:5932:02
10:19
#25394
15K
9.32 mi12:08:281:36:3410:2234:33
11:07
#26008
20K
12.43 mi12:45:192:13:2510:4436:51
11:52
#26382
Half
13.11 mi12:53:492:21:5510:508:30
12:28
#26507
25K
15.53 mi13:25:002:53:0611:0931:11
12:52
#26703
30K
18.64 mi14:06:103:34:1611:3041:10
13:15
#26768
20M
20.00 mi14:23:593:52:0511:3617:49
13:07
#26775
21M
21.00 mi14:37:434:05:4911:4213:44
13:44
#26756
35K
21.75 mi14:47:194:15:2511:459:36
12:50
#26768
23M
23.00 mi15:03:394:31:4511:4916:20
13:03
#26761
24M
24.00 mi15:16:154:44:2111:5112:36
12:36
#26750
40K
24.85 mi15:27:174:55:2311:5311:02
12:54
#26742
25.2M
25.20 mi15:32:055:00:1111:554:48
13:55
#26734
Finish
26.22 mi15:44:165:12:2211:5512:11
11:57
#26747
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi24684100561005626832(Top 94%)11276(Top 92%)11276(Top 206%)
10K6.21 mi3.10 mi25394-71010449-39310449-39325930(Top 91%)10750(Top 88%)10750(Top 197%)
15K9.32 mi3.11 mi26008-61410783-33410783-33426832(Top 94%)11276(Top 92%)11276(Top 206%)
20K12.43 mi3.11 mi26382-37410998-21510998-21526985(Top 95%)11383(Top 93%)11383(Top 208%)
Half13.11 mi0.68 mi26507-12511073-7511073-7527732(Top 98%)11843(Top 97%)11843(Top 217%)
25K15.53 mi2.42 mi26703-19611199-12611199-12627200(Top 96%)11544(Top 94%)11544(Top 211%)
30K18.64 mi3.11 mi26768-6511269-7011269-7026921(Top 95%)11444(Top 94%)11444(Top 209%)
20M20.00 mi1.36 mi26775-711278-911278-926548(Top 93%)11313(Top 93%)11313(Top 207%)
21M21.00 mi1.00 mi26756+1911274+411274+425921(Top 91%)11006(Top 90%)11006(Top 201%)
35K21.75 mi0.75 mi26768-1211289-1511289-1526803(Top 94%)11488(Top 94%)11488(Top 210%)
23M23.00 mi1.25 mi26761+711290-111290-126419(Top 93%)11308(Top 92%)11308(Top 207%)
24M24.00 mi1.00 mi26750+1111300-1011300-1026426(Top 93%)11335(Top 93%)11335(Top 207%)
40K24.85 mi0.85 mi26742+8113001130026196(Top 92%)11240(Top 92%)11240(Top 206%)
25.2M25.20 mi0.35 mi26734+8113001130026172(Top 92%)11268(Top 92%)11268(Top 206%)
Finish26.22 mi1.02 mi26747-1311310-1011310-1026728(Top 94%)11491(Top 94%)11491(Top 210%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 94%
×21story building
+97ft-345ft

Overall

26832

Females

11276

F18-39

11276

5K→10K

3.1 - 6.2 mi

Top 91%
×5story building
+79ft-138ft

Overall

25930

Females

10750

F18-39

10750

10K→15K

6.2 - 9.3 mi

Top 94%
×3story building
+67ft-78ft

Overall

26832

Females

11276

F18-39

11276

15K→20K

9.3 - 12.4 mi

Top 95%
×5story building
+106ft-86ft

Overall

26985

Females

11383

F18-39

11383

20K→Half

12.4 - 13.1 mi

Top 98%
×2story building
+19ft-37ft

Overall

27732

Females

11843

F18-39

11843

Half→25K

13.1 - 15.5 mi

Top 96%
×4story building
+66ft-88ft

Overall

27200

Females

11544

F18-39

11544

25K→30K

15.5 - 18.6 mi

Top 95%
×9story building
+181ft-148ft

Overall

26921

Females

11444

F18-39

11444

30K→20M

18.6 - 20.0 mi

Top 93%
×5story building
+64ft-50ft

Overall

26548

Females

11313

F18-39

11313

20M→21M

20.0 - 21.0 mi

Top 91%
×8story building
+106ft-24ft

Overall

25921

Females

11006

F18-39

11006

21M→35K

21.0 - 21.8 mi

Top 94%
×7story building
+17ft-86ft

Overall

26803

Females

11488

F18-39

11488

35K→23M

21.8 - 23.0 mi

Top 93%
×5story building
+23ft-63ft

Overall

26419

Females

11308

F18-39

11308

23M→24M

23.0 - 24.0 mi

Top 93%
×6story building
+12ft-82ft

Overall

26426

Females

11335

F18-39

11335

24M→40K

24.0 - 24.9 mi

Top 92%
×1story
+6ft-20ft

Overall

26196

Females

11240

F18-39

11240

40K→25.2M

24.9 - 25.2 mi

Top 92%
×1story
+13ft-16ft

Overall

26172

Females

11268

F18-39

11268

25.2M→Finish

25.2 - 26.2 mi

Top 94%
×2story building
+22ft-21ft

Overall

26728

Females

11491

F18-39

11491

Passing Analysis

Category:
Athletes Passed
396
Passed By
2459
Net Change
-2063
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24684
5K → 10K37747-710#24684#25394
10K → 15K15629-614#25394#26008
15K → 20K31405-374#26008#26382
20K → Half4129-125#26382#26507
Half → 25K28224-196#26507#26703
25K → 30K65130-65#26703#26768
30K → 20M3138-7#26768#26775
20M → 21M4324+19#26775#26756
21M → 35K2032-12#26756#26768
35K → 23M3932+7#26768#26761
23M → 24M3726+11#26761#26750
24M → 40K2416+8#26750#26742
40K → 25.2M135+8#26742#26734
25.2M → Finish922-13#26734#26747
TOTALS3962459-2063
📊

Passing Visuals

Category:
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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