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BOSTON MARATHON 2025

Chelsea Mccracken

Bib: 15363•F

MD

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 37%
Gender (Female)
#0 / 12228
Top 20%
Division (F18-39)
#0 / 5469
Top 34%
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
7:41/mi
23:51
↑ 97↓ 3451.5%
10K· 6.21 mi
7:37/mi
47:30
↑ 79↓ 1380.4%
15K· 9.32 mi
7:26/mi
1:10:37
↑ 67↓ 78
20K· 12.43 mi
7:23/mi
1:33:34
↑ 106↓ 860.1%
Half· 13.11 mi
7:23/mi
1:38:36
↑ 19↓ 370.5%
25K· 15.53 mi
7:27/mi
1:56:40
↑ 66↓ 880.2%
30K· 18.64 mi
7:38/mi
2:20:23
↑ 181↓ 1480.2%
20M
7:48/mi
2:30:59
↑ 64↓ 500.2%
21M
8:26/mi
2:39:25
↑ 106↓ 241.6%
35K· 21.75 mi
7:41/mi
2:45:10
↑ 17↓ 861.7%
23M
8:03/mi
2:55:15
↑ 23↓ 630.6%
24M
8:15/mi
3:03:30
↓ 821.3%
40K· 24.85 mi
8:09/mi
3:10:28
↓ 200.3%
25.2M
8:54/mi
3:13:32
↑ 13↓ 160.2%
Finish· 26.22 mi
7:12/mi
3:20:52
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:38:36
Pace7:31 /mi
2nd Half
Distance13.11 mi
Time1:42:16
Pace7:48 /mi
📊Positive Split: 3.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:58:3223:517:4123:51
7:41
-
10K
6.21 mi11:22:1147:307:3923:39
7:37
-0:04
15K
9.32 mi11:45:181:10:377:3523:07
7:26
-0:11
20K
12.43 mi12:08:151:33:347:3222:57
7:23
-0:03
Half
13.11 mi12:13:171:38:367:315:02
7:23
0:00
25K
15.53 mi12:31:211:56:407:3118:04
7:27
+0:04
30K
18.64 mi12:55:042:20:237:3223:43
7:38
+0:11
20M
20.00 mi13:05:402:30:597:3310:36
7:48
+0:10
21M
21.00 mi13:14:062:39:257:358:26
8:26
+0:38
35K
21.75 mi13:19:512:45:107:365:45
7:41
-0:45
23M
23.00 mi13:29:562:55:157:3710:05
8:03
+0:22
24M
24.00 mi13:38:113:03:307:398:15
8:15
+0:12
40K
24.85 mi13:45:093:10:287:406:58
8:09
-0:06
25.2M
25.20 mi13:48:133:13:327:413:04
8:54
+0:45
Finish
26.22 mi13:55:333:20:527:407:20
7:12
-1:42

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

7:12 /mi

Average Pace

7:40 /mi

Slowest Pace

8:54 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:16:30

38% of race

Time at Steady Pace

1:27:34

44% of race

Time at Slower Pace

36:48

18% of race

Average Pace: 7:40 /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 mi10:58:3223:517:4123:51
7:41
#13759
10K
6.21 mi11:22:1147:307:3923:39
7:37
#13440
15K
9.32 mi11:45:181:10:377:3523:07
7:26
#12657
20K
12.43 mi12:08:151:33:347:3222:57
7:23
#11893
Half
13.11 mi12:13:171:38:367:315:02
7:23
#11819
25K
15.53 mi12:31:211:56:407:3118:04
7:27
#11427
30K
18.64 mi12:55:042:20:237:3223:43
7:38
#10877
20M
20.00 mi13:05:402:30:597:3310:36
7:48
#10687
21M
21.00 mi13:14:062:39:257:358:26
8:26
#10614
35K
21.75 mi13:19:512:45:107:365:45
7:41
#10564
23M
23.00 mi13:29:562:55:157:3710:05
8:03
#10509
24M
24.00 mi13:38:113:03:307:398:15
8:15
#10590
40K
24.85 mi13:45:093:10:287:406:58
8:09
#10581
25.2M
25.20 mi13:48:133:13:327:413:04
8:54
#10572
Finish
26.22 mi13:55:333:20:527:407:20
7:12
#10399
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi137593744374411258(Top 40%)2507(Top 21%)2507(Top 46%)
10K6.21 mi3.10 mi13440+3193610+1343610+13413139(Top 46%)3451(Top 28%)3451(Top 63%)
15K9.32 mi3.11 mi12657+7833180+4303180+43011258(Top 40%)2507(Top 21%)2507(Top 46%)
20K12.43 mi3.11 mi11893+7642815+3652815+3659812(Top 35%)1883(Top 15%)1883(Top 34%)
Half13.11 mi0.68 mi11819+742786+292786+2910750(Top 38%)2315(Top 19%)2315(Top 42%)
25K15.53 mi2.42 mi11427+3922607+1792607+1799577(Top 34%)1919(Top 16%)1919(Top 35%)
30K18.64 mi3.11 mi10877+5502399+2082399+2088723(Top 31%)1712(Top 14%)1712(Top 31%)
20M20.00 mi1.36 mi10687+1902349+502349+509060(Top 32%)2015(Top 16%)2015(Top 37%)
21M21.00 mi1.00 mi10614+732351-22351-210071(Top 35%)2637(Top 22%)2637(Top 48%)
35K21.75 mi0.75 mi10564+502340+112340+1110022(Top 35%)2608(Top 21%)2608(Top 48%)
23M23.00 mi1.25 mi10509+552354-142354-1410438(Top 37%)2961(Top 24%)2961(Top 54%)
24M24.00 mi1.00 mi10590-812438-842438-8412915(Top 45%)4265(Top 35%)4265(Top 78%)
40K24.85 mi0.85 mi10581+92458-202458-2011226(Top 40%)3510(Top 29%)3510(Top 64%)
25.2M25.20 mi0.35 mi10572+92472-142472-1411220(Top 40%)3594(Top 29%)3594(Top 66%)
Finish26.22 mi1.02 mi10399+1732418+542418+547064(Top 25%)1682(Top 14%)1682(Top 31%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 40%
×21story building
+97ft-345ft

Overall

11258

Females

2507

F18-39

2507

5K→10K

3.1 - 6.2 mi

Top 46%
×5story building
+79ft-138ft

Overall

13139

Females

3451

F18-39

3451

10K→15K

6.2 - 9.3 mi

Top 40%
×3story building
+67ft-78ft

Overall

11258

Females

2507

F18-39

2507

15K→20K

9.3 - 12.4 mi

Top 35%
×5story building
+106ft-86ft

Overall

9812

Females

1883

F18-39

1883

20K→Half

12.4 - 13.1 mi

Top 38%
×2story building
+19ft-37ft

Overall

10750

Females

2315

F18-39

2315

Half→25K

13.1 - 15.5 mi

Top 34%
×4story building
+66ft-88ft

Overall

9577

Females

1919

F18-39

1919

25K→30K

15.5 - 18.6 mi

Top 31%
×9story building
+181ft-148ft

Overall

8723

Females

1712

F18-39

1712

30K→20M

18.6 - 20.0 mi

Top 32%
×5story building
+64ft-50ft

Overall

9060

Females

2015

F18-39

2015

20M→21M

20.0 - 21.0 mi

Top 35%
×8story building
+106ft-24ft

Overall

10071

Females

2637

F18-39

2637

21M→35K

21.0 - 21.8 mi

Top 35%
×7story building
+17ft-86ft

Overall

10022

Females

2608

F18-39

2608

35K→23M

21.8 - 23.0 mi

Top 37%
×5story building
+23ft-63ft

Overall

10438

Females

2961

F18-39

2961

23M→24M

23.0 - 24.0 mi

Top 45%
×6story building
+12ft-82ft

Overall

12915

Females

4265

F18-39

4265

24M→40K

24.0 - 24.9 mi

Top 40%
×1story
+6ft-20ft

Overall

11226

Females

3510

F18-39

3510

40K→25.2M

24.9 - 25.2 mi

Top 40%
×1story
+13ft-16ft

Overall

11220

Females

3594

F18-39

3594

25.2M→Finish

25.2 - 26.2 mi

Top 25%
×2story building
+22ft-21ft

Overall

7064

Females

1682

F18-39

1682

Passing Analysis

Category:
Athletes Passed
4009
Passed By
649
Net Change
+3360
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13759
5K → 10K470151+319#13759#13440
10K → 15K79512+783#13440#12657
15K → 20K7695+764#12657#11893
20K → Half817+74#11893#11819
Half → 25K40311+392#11819#11427
25K → 30K57121+550#11427#10877
30K → 20M21626+190#10877#10687
20M → 21M13865+73#10687#10614
21M → 35K7929+50#10614#10564
35K → 23M12368+55#10564#10509
23M → 24M61142-81#10509#10590
24M → 40K6657+9#10590#10581
40K → 25.2M4940+9#10581#10572
25.2M → Finish18815+173#10572#10399
TOTALS4009649+3360
📊

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