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BOSTON MARATHON 2025

Heidi Cron

Bib: 12862•F

OH

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 45%
Gender (Female)
#0 / 12228
Top 30%
Division (F18-39)
#0 / 5469
Top 48%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:41
Rank: #10400
Start → 5K
22:41 | 7:18/mi
10K· 6.21 mi
44:53
Rank: #9667 (+733)
5K → 10K
22:12 | 7:09/mi
15K· 9.32 mi
1:06:57
Rank: #9193 (+474)
10K → 15K
22:04 | 7:06/mi
20K· 12.43 mi
1:29:42
Rank: #9153 (+40)
15K → 20K
22:45 | 7:19/mi
Half· 13.11 mi
1:34:46
Rank: #9250 (-97)
20K → Half
5:04 | 7:26/mi
25K· 15.53 mi
1:54:15
Rank: #10048 (-798)
Half → 25K
19:29 | 8:02/mi
30K· 18.64 mi
2:21:35
Rank: #11397 (-1349)
25K → 30K
27:20 | 8:48/mi
20M
2:33:46
Rank: #11805 (-408)
30K → 20M
12:11 | 8:58/mi
21M
2:43:12
Rank: #12078 (-273)
20M → 21M
9:26 | 9:26/mi
35K· 21.75 mi
2:49:56
Rank: #12334 (-256)
21M → 35K
6:44 | 9:00/mi
23M
3:01:33
Rank: #12713 (-379)
35K → 23M
11:37 | 9:17/mi
24M
3:10:20
Rank: #12877 (-164)
23M → 24M
8:47 | 8:47/mi
40K· 24.85 mi
3:17:22
Rank: #12829 (+48)
24M → 40K
7:02 | 8:14/mi
25.2M
3:20:28
Rank: #12797 (+32)
40K → 25.2M
3:06 | 8:59/mi
Finish· 26.22 mi
3:28:28
Rank: #12734 (+63)
25.2M → Finish
8:00 | 7:51/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:34:46
Pace7:14 /mi
2nd Half
Distance13.11 mi
Time1:53:42
Pace8:40 /mi
📊Positive Split: 20.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:50:5522:417:1822:41
7:18
-
10K
6.21 mi11:13:0744:537:1322:12
7:09
-0:09
15K
9.32 mi11:35:111:06:577:1122:04
7:06
-0:03
20K
12.43 mi11:57:561:29:427:1322:45
7:19
+0:13
Half
13.11 mi12:03:001:34:467:145:04
7:26
+0:07
25K
15.53 mi12:22:291:54:157:2119:29
8:02
+0:36
30K
18.64 mi12:49:492:21:357:3627:20
8:48
+0:46
20M
20.00 mi13:02:002:33:467:4112:11
8:58
+0:10
21M
21.00 mi13:11:262:43:127:469:26
9:26
+0:28
35K
21.75 mi13:18:102:49:567:496:44
9:00
-0:26
23M
23.00 mi13:29:473:01:337:5411:37
9:17
+0:17
24M
24.00 mi13:38:343:10:207:568:47
8:47
-0:30
40K
24.85 mi13:45:363:17:227:567:02
8:14
-0:33
25.2M
25.20 mi13:48:423:20:287:573:06
8:59
+0:45
Finish
26.22 mi13:56:423:28:287:578:00
7:51
-1:08

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

7:06 /mi

Average Pace

7:57 /mi

Slowest Pace

9:26 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:34:46

45% of race

Time at Steady Pace

34:31

17% of race

Time at Slower Pace

1:19:11

38% of race

Average Pace: 7:57 /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 mi10:50:5522:417:1822:41
7:18
#10400
10K
6.21 mi11:13:0744:537:1322:12
7:09
#9667
15K
9.32 mi11:35:111:06:577:1122:04
7:06
#9193
20K
12.43 mi11:57:561:29:427:1322:45
7:19
#9153
Half
13.11 mi12:03:001:34:467:145:04
7:26
#9250
25K
15.53 mi12:22:291:54:157:2119:29
8:02
#10048
30K
18.64 mi12:49:492:21:357:3627:20
8:48
#11397
20M
20.00 mi13:02:002:33:467:4112:11
8:58
#11805
21M
21.00 mi13:11:262:43:127:469:26
9:26
#12078
35K
21.75 mi13:18:102:49:567:496:44
9:00
#12334
23M
23.00 mi13:29:473:01:337:5411:37
9:17
#12713
24M
24.00 mi13:38:343:10:207:568:47
8:47
#12877
40K
24.85 mi13:45:363:17:227:567:02
8:14
#12829
25.2M
25.20 mi13:48:423:20:287:573:06
8:59
#12797
Finish
26.22 mi13:56:423:28:287:578:00
7:51
#12734
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi10400199419948372(Top 29%)1192(Top 10%)1192(Top 22%)
10K6.21 mi3.10 mi9667+7331652+3421652+3429058(Top 32%)1403(Top 11%)1403(Top 26%)
15K9.32 mi3.11 mi9193+4741477+1751477+1758372(Top 29%)1192(Top 10%)1192(Top 22%)
20K12.43 mi3.11 mi9153+401483-61483-69246(Top 33%)1633(Top 13%)1633(Top 30%)
Half13.11 mi0.68 mi9250-971532-491532-4911204(Top 39%)2545(Top 21%)2545(Top 47%)
25K15.53 mi2.42 mi10048-7981932-4001932-40014178(Top 50%)4291(Top 35%)4291(Top 78%)
30K18.64 mi3.11 mi11397-13492675-7432675-74316596(Top 58%)5799(Top 47%)5799(Top 106%)
20M20.00 mi1.36 mi11805-4082926-2512926-25116611(Top 58%)5919(Top 48%)5919(Top 108%)
21M21.00 mi1.00 mi12078-2733113-1873113-18715786(Top 56%)5589(Top 46%)5589(Top 102%)
35K21.75 mi0.75 mi12334-2563281-1683281-16818227(Top 64%)7019(Top 57%)7019(Top 128%)
23M23.00 mi1.25 mi12713-3793510-2293510-22917687(Top 62%)6829(Top 56%)6829(Top 125%)
24M24.00 mi1.00 mi12877-1643633-1233633-12316224(Top 57%)6050(Top 49%)6050(Top 111%)
40K24.85 mi0.85 mi12829+483637-43637-411742(Top 41%)3777(Top 31%)3777(Top 69%)
25.2M25.20 mi0.35 mi12797+323631+63631+611800(Top 42%)3876(Top 32%)3876(Top 71%)
Finish26.22 mi1.02 mi12734+633623+83623+811845(Top 42%)3853(Top 32%)3853(Top 70%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 29%
×21stories
+97ft-345ft

Overall

8372

Females

1192

F18-39

1192

5K→10K

3.1 - 6.2 mi

Top 32%
×5stories
+79ft-138ft

Overall

9058

Females

1403

F18-39

1403

10K→15K

6.2 - 9.3 mi

Top 29%
×3stories
+67ft-78ft

Overall

8372

Females

1192

F18-39

1192

15K→20K

9.3 - 12.4 mi

Top 33%
×5stories
+106ft-86ft

Overall

9246

Females

1633

F18-39

1633

20K→Half

12.4 - 13.1 mi

Top 39%
×2stories
+19ft-37ft

Overall

11204

Females

2545

F18-39

2545

Half→25K

13.1 - 15.5 mi

Top 50%
×4stories
+66ft-88ft

Overall

14178

Females

4291

F18-39

4291

25K→30K

15.5 - 18.6 mi

Top 58%
×9stories
+181ft-148ft

Overall

16596

Females

5799

F18-39

5799

30K→20M

18.6 - 20.0 mi

Top 58%
×5stories
+64ft-50ft

Overall

16611

Females

5919

F18-39

5919

20M→21M

20.0 - 21.0 mi

Top 56%
×8stories
+106ft-24ft

Overall

15786

Females

5589

F18-39

5589

21M→35K

21.0 - 21.8 mi

Top 64%
×7stories
+17ft-86ft

Overall

18227

Females

7019

F18-39

7019

35K→23M

21.8 - 23.0 mi

Top 62%
×5stories
+23ft-63ft

Overall

17687

Females

6829

F18-39

6829

23M→24M

23.0 - 24.0 mi

Top 57%
×6stories
+12ft-82ft

Overall

16224

Females

6050

F18-39

6050

24M→40K

24.0 - 24.9 mi

Top 41%
×1story
+6ft-20ft

Overall

11742

Females

3777

F18-39

3777

40K→25.2M

24.9 - 25.2 mi

Top 42%
×1story
+13ft-16ft

Overall

11800

Females

3876

F18-39

3876

25.2M→Finish

25.2 - 26.2 mi

Top 42%
×2stories
+22ft-21ft

Overall

11845

Females

3853

F18-39

3853

Passing Analysis

Category:
Athletes Passed
2001*
Passed By
4333
Net Change
-2334
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10400
5K → 10K781*48+733#10400#9667
10K → 15K48915+474#9667#9193
15K → 20K189149+40#9193#9153
20K → Half12109-97#9153#9250
Half → 25K35832-798#9250#10048
25K → 30K381386-1349#10048#11397
30K → 20M44452-408#11397#11805
20M → 21M50323-273#11805#12078
21M → 35K20276-256#12078#12334
35K → 23M49428-379#12334#12713
23M → 24M40204-164#12713#12877
24M → 40K9345+48#12877#12829
40K → 25.2M5321+32#12829#12797
25.2M → Finish10845+63#12797#12734
TOTALS2001*4333-2334

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

Passing Visuals

Category:
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🔥Passing Intensity

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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