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BOSTON MARATHON 2025

Alison Costa

Bib: 19866•F

ON

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Top 44%
Division (F40-44)
#0 / 1718
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
8:18/mi
25:46
↑ 97↓ 3451.5%
10K· 6.21 mi
8:33/mi
52:19
↑ 79↓ 1380.4%
15K· 9.32 mi
8:23/mi
1:18:23
↑ 67↓ 78
20K· 12.43 mi
8:27/mi
1:44:38
↑ 106↓ 860.1%
Half· 13.11 mi
8:18/mi
1:50:18
↑ 19↓ 370.5%
25K· 15.53 mi
8:40/mi
2:11:19
↑ 66↓ 880.2%
30K· 18.64 mi
9:02/mi
2:39:23
↑ 181↓ 1480.2%
20M
9:09/mi
2:51:49
↑ 64↓ 500.2%
21M
9:55/mi
3:01:44
↑ 106↓ 241.6%
35K· 21.75 mi
8:52/mi
3:08:22
↑ 17↓ 861.7%
23M
8:58/mi
3:19:35
↑ 23↓ 630.6%
24M
8:49/mi
3:28:24
↓ 821.3%
40K· 24.85 mi
9:09/mi
3:36:13
↓ 200.3%
25.2M
9:40/mi
3:39:33
↑ 13↓ 160.2%
Finish· 26.22 mi
8:43/mi
3:48:26
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:50:18
Pace8:25 /mi
2nd Half
Distance13.11 mi
Time1:58:08
Pace9:01 /mi
📊Positive Split: 7.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:3325:468:1825:46
8:18
-
10K
6.21 mi11:44:0652:198:2526:33
8:33
+0:15
15K
9.32 mi12:10:101:18:238:2526:04
8:23
-0:10
20K
12.43 mi12:36:251:44:388:2526:15
8:27
+0:04
Half
13.11 mi12:42:051:50:188:255:40
8:18
-0:09
25K
15.53 mi13:03:062:11:198:2721:01
8:40
+0:22
30K
18.64 mi13:31:102:39:238:3328:04
9:02
+0:22
20M
20.00 mi13:43:362:51:498:3512:26
9:09
+0:07
21M
21.00 mi13:53:313:01:448:399:55
9:55
+0:46
35K
21.75 mi14:00:093:08:228:406:38
8:52
-1:03
23M
23.00 mi14:11:223:19:358:4111:13
8:58
+0:06
24M
24.00 mi14:20:113:28:248:418:49
8:49
-0:09
40K
24.85 mi14:28:003:36:138:427:49
9:09
+0:20
25.2M
25.20 mi14:31:203:39:338:433:20
9:40
+0:31
Finish
26.22 mi14:40:133:48:268:438:53
8:43
-0:57

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

8:18 /mi

Average Pace

8:43 /mi

Slowest Pace

9:55 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:14:56

85% of race

Time at Steady Pace

23:35

10% of race

Time at Slower Pace

9:55

4% of race

Average Pace: 8:43 /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 mi11:17:3325:468:1825:46
8:18
#18684
10K
6.21 mi11:44:0652:198:2526:33
8:33
#19366
15K
9.32 mi12:10:101:18:238:2526:04
8:23
#19089
20K
12.43 mi12:36:251:44:388:2526:15
8:27
#18777
Half
13.11 mi12:42:051:50:188:255:40
8:18
#18726
25K
15.53 mi13:03:062:11:198:2721:01
8:40
#18615
30K
18.64 mi13:31:102:39:238:3328:04
9:02
#18450
20M
20.00 mi13:43:362:51:498:3512:26
9:09
#18381
21M
21.00 mi13:53:313:01:448:399:55
9:55
#18327
35K
21.75 mi14:00:093:08:228:406:38
8:52
#18289
23M
23.00 mi14:11:223:19:358:4111:13
8:58
#18155
24M
24.00 mi14:20:113:28:248:418:49
8:49
#18050
40K
24.85 mi14:28:003:36:138:427:49
9:09
#18010
25.2M
25.20 mi14:31:203:39:338:433:20
9:40
#17968
Finish
26.22 mi14:40:133:48:268:438:53
8:43
#17949
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi186846730673018645(Top 66%)6691(Top 55%)6691(Top 389%)
10K6.21 mi3.10 mi19366-6827101-3717101-37120072(Top 71%)7504(Top 61%)7504(Top 437%)
15K9.32 mi3.11 mi19089+2776956+1456956+14518645(Top 66%)6691(Top 55%)6691(Top 389%)
20K12.43 mi3.11 mi18777+3126776+1806776+18017889(Top 63%)6283(Top 51%)6283(Top 366%)
Half13.11 mi0.68 mi18726+516748+286748+2818004(Top 63%)6321(Top 52%)6321(Top 368%)
25K15.53 mi2.42 mi18615+1116702+466702+4618209(Top 64%)6540(Top 53%)6540(Top 381%)
30K18.64 mi3.11 mi18450+1656636+666636+6617860(Top 63%)6509(Top 53%)6509(Top 379%)
20M20.00 mi1.36 mi18381+696629+76629+717547(Top 62%)6444(Top 53%)6444(Top 375%)
21M21.00 mi1.00 mi18327+546622+76622+717993(Top 63%)6787(Top 56%)6787(Top 395%)
35K21.75 mi0.75 mi18289+386619+36619+317624(Top 62%)6699(Top 55%)6699(Top 390%)
23M23.00 mi1.25 mi18155+1346578+416578+4116059(Top 57%)5924(Top 48%)5924(Top 345%)
24M24.00 mi1.00 mi18050+1056543+356543+3516444(Top 58%)6180(Top 51%)6180(Top 360%)
40K24.85 mi0.85 mi18010+406555-126555-1217107(Top 60%)6638(Top 54%)6638(Top 386%)
25.2M25.20 mi0.35 mi17968+426535+206535+2015517(Top 55%)5841(Top 48%)5841(Top 340%)
Finish26.22 mi1.02 mi17949+196541-66541-617606(Top 62%)6874(Top 56%)6874(Top 400%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 66%
×21story building
+97ft-345ft

Overall

18645

Females

6691

F40-44

6691

5K→10K

3.1 - 6.2 mi

Top 71%
×5story building
+79ft-138ft

Overall

20072

Females

7504

F40-44

7504

10K→15K

6.2 - 9.3 mi

Top 66%
×3story building
+67ft-78ft

Overall

18645

Females

6691

F40-44

6691

15K→20K

9.3 - 12.4 mi

Top 63%
×5story building
+106ft-86ft

Overall

17889

Females

6283

F40-44

6283

20K→Half

12.4 - 13.1 mi

Top 63%
×2story building
+19ft-37ft

Overall

18004

Females

6321

F40-44

6321

Half→25K

13.1 - 15.5 mi

Top 64%
×4story building
+66ft-88ft

Overall

18209

Females

6540

F40-44

6540

25K→30K

15.5 - 18.6 mi

Top 63%
×9story building
+181ft-148ft

Overall

17860

Females

6509

F40-44

6509

30K→20M

18.6 - 20.0 mi

Top 62%
×5story building
+64ft-50ft

Overall

17547

Females

6444

F40-44

6444

20M→21M

20.0 - 21.0 mi

Top 63%
×8story building
+106ft-24ft

Overall

17993

Females

6787

F40-44

6787

21M→35K

21.0 - 21.8 mi

Top 62%
×7story building
+17ft-86ft

Overall

17624

Females

6699

F40-44

6699

35K→23M

21.8 - 23.0 mi

Top 57%
×5story building
+23ft-63ft

Overall

16059

Females

5924

F40-44

5924

23M→24M

23.0 - 24.0 mi

Top 58%
×6story building
+12ft-82ft

Overall

16444

Females

6180

F40-44

6180

24M→40K

24.0 - 24.9 mi

Top 60%
×1story
+6ft-20ft

Overall

17107

Females

6638

F40-44

6638

40K→25.2M

24.9 - 25.2 mi

Top 55%
×1story
+13ft-16ft

Overall

15517

Females

5841

F40-44

5841

25.2M→Finish

25.2 - 26.2 mi

Top 62%
×2story building
+22ft-21ft

Overall

17606

Females

6874

F40-44

6874

Passing Analysis

Category:
Athletes Passed
2266
Passed By
1531
Net Change
+735
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18684
5K → 10K79761-682#18684#19366
10K → 15K36083+277#19366#19089
15K → 20K36957+312#19089#18777
20K → Half6817+51#18777#18726
Half → 25K20897+111#18726#18615
25K → 30K322157+165#18615#18450
30K → 20M13768+69#18450#18381
20M → 21M12672+54#18381#18327
21M → 35K7537+38#18327#18289
35K → 23M17238+134#18289#18155
23M → 24M12722+105#18155#18050
24M → 40K8848+40#18050#18010
40K → 25.2M519+42#18010#17968
25.2M → Finish8465+19#17968#17949
TOTALS22661531+735
📊

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