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BOSTON MARATHON 2025

Jennifer Cronin

Bib: 20432•F

FL

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
8:37/mi
26:45
↑ 97↓ 3451.5%
10K· 6.21 mi
8:29/mi
53:05
↑ 79↓ 1380.4%
15K· 9.32 mi
8:26/mi
1:19:18
↑ 67↓ 78
20K· 12.43 mi
8:34/mi
1:45:55
↑ 106↓ 860.1%
Half· 13.11 mi
8:29/mi
1:51:42
↑ 19↓ 370.5%
25K· 15.53 mi
8:33/mi
2:12:27
↑ 66↓ 880.2%
30K· 18.64 mi
8:46/mi
2:39:42
↑ 181↓ 1480.2%
20M
8:53/mi
2:51:46
↑ 64↓ 500.2%
21M
9:15/mi
3:01:01
↑ 106↓ 241.6%
35K· 21.75 mi
9:03/mi
3:07:47
↑ 17↓ 861.7%
23M
9:13/mi
3:19:20
↑ 23↓ 630.6%
24M
9:17/mi
3:28:37
↓ 821.3%
40K· 24.85 mi
9:16/mi
3:36:32
↓ 200.3%
25.2M
9:43/mi
3:39:53
↑ 13↓ 160.2%
Finish· 26.22 mi
8:19/mi
3:48:21
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:51:42
Pace8:31 /mi
2nd Half
Distance13.11 mi
Time1:56:39
Pace8:54 /mi
📊Positive Split: 4.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:24:3626:458:3726:45
8:37
-
10K
6.21 mi11:50:5653:058:3326:20
8:29
-0:08
15K
9.32 mi12:17:091:19:188:3026:13
8:26
-0:03
20K
12.43 mi12:43:461:45:558:3126:37
8:34
+0:08
Half
13.11 mi12:49:331:51:428:315:47
8:29
-0:05
25K
15.53 mi13:10:182:12:278:3220:45
8:33
+0:04
30K
18.64 mi13:37:332:39:428:3427:15
8:46
+0:13
20M
20.00 mi13:49:372:51:468:3512:04
8:53
+0:07
21M
21.00 mi13:58:523:01:018:379:15
9:15
+0:22
35K
21.75 mi14:05:383:07:478:386:46
9:03
-0:12
23M
23.00 mi14:17:113:19:208:4011:33
9:13
+0:10
24M
24.00 mi14:26:283:28:378:429:17
9:17
+0:04
40K
24.85 mi14:34:233:36:328:437:55
9:16
-0:01
25.2M
25.20 mi14:37:443:39:538:443:21
9:43
+0:27
Finish
26.22 mi14:46:123:48:218:438:28
8:19
-1:24

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

8:19 /mi

Average Pace

8:43 /mi

Slowest Pace

9:43 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:07:00

82% of race

Time at Steady Pace

41:21

18% of race

Time at Slower Pace

0:00

0% 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 mi11:24:3626:458:3726:45
8:37
#20518
10K
6.21 mi11:50:5653:058:3326:20
8:29
#20093
15K
9.32 mi12:17:091:19:188:3026:13
8:26
#19718
20K
12.43 mi12:43:461:45:558:3126:37
8:34
#19409
Half
13.11 mi12:49:331:51:428:315:47
8:29
#19400
25K
15.53 mi13:10:182:12:278:3220:45
8:33
#19067
30K
18.64 mi13:37:332:39:428:3427:15
8:46
#18553
20M
20.00 mi13:49:372:51:468:3512:04
8:53
#18360
21M
21.00 mi13:58:523:01:018:379:15
9:15
#18135
35K
21.75 mi14:05:383:07:478:386:46
9:03
#18140
23M
23.00 mi14:17:113:19:208:4011:33
9:13
#18079
24M
24.00 mi14:26:283:28:378:429:17
9:17
#18106
40K
24.85 mi14:34:233:36:328:437:55
9:16
#18087
25.2M
25.20 mi14:37:443:39:538:443:21
9:43
#18051
Finish
26.22 mi14:46:123:48:218:438:28
8:19
#17930
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi205187813781318964(Top 67%)6880(Top 56%)6880(Top 400%)
10K6.21 mi3.10 mi20093+4257527+2867527+28619662(Top 69%)7280(Top 60%)7280(Top 424%)
15K9.32 mi3.11 mi19718+3757304+2237304+22318964(Top 67%)6880(Top 56%)6880(Top 400%)
20K12.43 mi3.11 mi19409+3097135+1697135+16918653(Top 66%)6719(Top 55%)6719(Top 391%)
Half13.11 mi0.68 mi19400+97134+17134+119084(Top 67%)6943(Top 57%)6943(Top 404%)
25K15.53 mi2.42 mi19067+3336956+1786956+17817542(Top 62%)6160(Top 50%)6160(Top 359%)
30K18.64 mi3.11 mi18553+5146687+2696687+26916442(Top 58%)5710(Top 47%)5710(Top 332%)
20M20.00 mi1.36 mi18360+1936614+736614+7316148(Top 57%)5690(Top 47%)5690(Top 331%)
21M21.00 mi1.00 mi18135+2256514+1006514+10014924(Top 53%)5140(Top 42%)5140(Top 299%)
35K21.75 mi0.75 mi18140-56532-186532-1818469(Top 65%)7169(Top 59%)7169(Top 417%)
23M23.00 mi1.25 mi18079+616538-66538-617461(Top 61%)6699(Top 55%)6699(Top 390%)
24M24.00 mi1.00 mi18106-276576-386576-3818758(Top 66%)7415(Top 61%)7415(Top 432%)
40K24.85 mi0.85 mi18087+196592-166592-1617670(Top 62%)6957(Top 57%)6957(Top 405%)
25.2M25.20 mi0.35 mi18051+366582+106582+1015772(Top 56%)5983(Top 49%)5983(Top 348%)
Finish26.22 mi1.02 mi17930+1216530+526530+5215006(Top 53%)5491(Top 45%)5491(Top 320%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 67%
×21story building
+97ft-345ft

Overall

18964

Females

6880

F40-44

6880

5K→10K

3.1 - 6.2 mi

Top 69%
×5story building
+79ft-138ft

Overall

19662

Females

7280

F40-44

7280

10K→15K

6.2 - 9.3 mi

Top 67%
×3story building
+67ft-78ft

Overall

18964

Females

6880

F40-44

6880

15K→20K

9.3 - 12.4 mi

Top 66%
×5story building
+106ft-86ft

Overall

18653

Females

6719

F40-44

6719

20K→Half

12.4 - 13.1 mi

Top 67%
×2story building
+19ft-37ft

Overall

19084

Females

6943

F40-44

6943

Half→25K

13.1 - 15.5 mi

Top 62%
×4story building
+66ft-88ft

Overall

17542

Females

6160

F40-44

6160

25K→30K

15.5 - 18.6 mi

Top 58%
×9story building
+181ft-148ft

Overall

16442

Females

5710

F40-44

5710

30K→20M

18.6 - 20.0 mi

Top 57%
×5story building
+64ft-50ft

Overall

16148

Females

5690

F40-44

5690

20M→21M

20.0 - 21.0 mi

Top 53%
×8story building
+106ft-24ft

Overall

14924

Females

5140

F40-44

5140

21M→35K

21.0 - 21.8 mi

Top 65%
×7story building
+17ft-86ft

Overall

18469

Females

7169

F40-44

7169

35K→23M

21.8 - 23.0 mi

Top 61%
×5story building
+23ft-63ft

Overall

17461

Females

6699

F40-44

6699

23M→24M

23.0 - 24.0 mi

Top 66%
×6story building
+12ft-82ft

Overall

18758

Females

7415

F40-44

7415

24M→40K

24.0 - 24.9 mi

Top 62%
×1story
+6ft-20ft

Overall

17670

Females

6957

F40-44

6957

40K→25.2M

24.9 - 25.2 mi

Top 56%
×1story
+13ft-16ft

Overall

15772

Females

5983

F40-44

5983

25.2M→Finish

25.2 - 26.2 mi

Top 53%
×2story building
+22ft-21ft

Overall

15006

Females

5491

F40-44

5491

Passing Analysis

Category:
Athletes Passed
3269
Passed By
681
Net Change
+2588
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20518
5K → 10K557132+425#20518#20093
10K → 15K42550+375#20093#19718
15K → 20K37465+309#19718#19409
20K → Half4031+9#19409#19400
Half → 25K35623+333#19400#19067
25K → 30K54632+514#19067#18553
30K → 20M21623+193#18553#18360
20M → 21M23914+225#18360#18135
21M → 35K5560-5#18135#18140
35K → 23M13170+61#18140#18079
23M → 24M7097-27#18079#18106
24M → 40K7354+19#18106#18087
40K → 25.2M4913+36#18087#18051
25.2M → Finish13817+121#18051#17930
TOTALS3269681+2588
📊

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