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BOSTON MARATHON 2025

Erin Bonthron

Bib: 15749•F

CO

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

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
7:38/mi
23:44
↑ 97↓ 3451.5%
10K· 6.21 mi
7:42/mi
47:39
↑ 79↓ 1380.4%
15K· 9.32 mi
7:48/mi
1:11:52
↑ 67↓ 78
20K· 12.43 mi
7:53/mi
1:36:22
↑ 106↓ 860.1%
Half· 13.11 mi
7:36/mi
1:41:33
↑ 19↓ 370.5%
25K· 15.53 mi
7:48/mi
2:00:28
↑ 66↓ 880.2%
30K· 18.64 mi
8:17/mi
2:26:12
↑ 181↓ 1480.2%
20M
8:19/mi
2:37:30
↑ 64↓ 500.2%
21M
8:40/mi
2:46:10
↑ 106↓ 241.6%
35K· 21.75 mi
8:15/mi
2:52:20
↑ 17↓ 861.7%
23M
8:26/mi
3:02:54
↑ 23↓ 630.6%
24M
7:57/mi
3:10:51
↓ 821.3%
40K· 24.85 mi
8:14/mi
3:17:53
↓ 200.3%
25.2M
8:36/mi
3:20:51
↑ 13↓ 160.2%
Finish· 26.22 mi
7:28/mi
3:28:28
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:41:33
Pace7:45 /mi
2nd Half
Distance13.11 mi
Time1:46:55
Pace8:09 /mi
📊Positive Split: 5.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:55:4323:447:3823:44
7:38
-
10K
6.21 mi11:19:3847:397:4023:55
7:42
+0:04
15K
9.32 mi11:43:511:11:527:4324:13
7:48
+0:06
20K
12.43 mi12:08:211:36:227:4524:30
7:53
+0:05
Half
13.11 mi12:13:321:41:337:455:11
7:36
-0:17
25K
15.53 mi12:32:272:00:287:4518:55
7:48
+0:12
30K
18.64 mi12:58:112:26:127:5125:44
8:17
+0:29
20M
20.00 mi13:09:292:37:307:5211:18
8:19
+0:02
21M
21.00 mi13:18:092:46:107:558:40
8:40
+0:21
35K
21.75 mi13:24:192:52:207:556:10
8:15
-0:25
23M
23.00 mi13:34:533:02:547:5710:34
8:26
+0:11
24M
24.00 mi13:42:503:10:517:577:57
7:57
-0:29
40K
24.85 mi13:49:523:17:537:587:02
8:14
+0:17
25.2M
25.20 mi13:52:503:20:517:582:58
8:36
+0:22
Finish
26.22 mi14:00:273:28:287:577:37
7:28
-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

7:28 /mi

Average Pace

7:57 /mi

Slowest Pace

8:40 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:16:02

65% of race

Time at Steady Pace

1:12:26

35% of race

Time at Slower Pace

0:00

0% 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 mi10:55:4323:447:3823:44
7:38
#13438
10K
6.21 mi11:19:3847:397:4023:55
7:42
#13667
15K
9.32 mi11:43:511:11:527:4324:13
7:48
#13844
20K
12.43 mi12:08:211:36:227:4524:30
7:53
#13852
Half
13.11 mi12:13:321:41:337:455:11
7:36
#13761
25K
15.53 mi12:32:272:00:287:4518:55
7:48
#13483
30K
18.64 mi12:58:112:26:127:5125:44
8:17
#13434
20M
20.00 mi13:09:292:37:307:5211:18
8:19
#13341
21M
21.00 mi13:18:092:46:107:558:40
8:40
#13184
35K
21.75 mi13:24:192:52:207:556:10
8:15
#13200
23M
23.00 mi13:34:533:02:547:5710:34
8:26
#13173
24M
24.00 mi13:42:503:10:517:577:57
7:57
#13048
40K
24.85 mi13:49:523:17:537:587:02
8:14
#12983
25.2M
25.20 mi13:52:503:20:517:582:58
8:36
#12925
Finish
26.22 mi14:00:273:28:287:577:37
7:28
#12732
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi134383569356914334(Top 50%)4222(Top 35%)4222(Top 77%)
10K6.21 mi3.10 mi13667-2293743-1743743-17413890(Top 49%)3891(Top 32%)3891(Top 71%)
15K9.32 mi3.11 mi13844-1773871-1283871-12814334(Top 50%)4222(Top 35%)4222(Top 77%)
20K12.43 mi3.11 mi13852-83929-583929-5813973(Top 49%)4079(Top 33%)4079(Top 75%)
Half13.11 mi0.68 mi13761+913889+403889+4012621(Top 44%)3305(Top 27%)3305(Top 60%)
25K15.53 mi2.42 mi13483+2783764+1253764+12512399(Top 44%)3339(Top 27%)3339(Top 61%)
30K18.64 mi3.11 mi13434+493782-183782-1813387(Top 47%)4045(Top 33%)4045(Top 74%)
20M20.00 mi1.36 mi13341+933765+173765+1712607(Top 44%)3754(Top 31%)3754(Top 69%)
21M21.00 mi1.00 mi13184+1573713+523713+5211508(Top 41%)3363(Top 28%)3363(Top 61%)
35K21.75 mi0.75 mi13200-163739-263739-2613914(Top 49%)4626(Top 38%)4626(Top 85%)
23M23.00 mi1.25 mi13173+273773-343773-3412940(Top 46%)4234(Top 35%)4234(Top 77%)
24M24.00 mi1.00 mi13048+1253731+423731+4210920(Top 38%)3262(Top 27%)3262(Top 60%)
40K24.85 mi0.85 mi12983+653724+73724+711741(Top 41%)3776(Top 31%)3776(Top 69%)
25.2M25.20 mi0.35 mi12925+583701+233701+239536(Top 34%)2813(Top 23%)2813(Top 51%)
Finish26.22 mi1.02 mi12732+1933621+803621+809054(Top 32%)2572(Top 21%)2572(Top 47%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 50%
×21story building
+97ft-345ft

Overall

14334

Females

4222

F18-39

4222

5K→10K

3.1 - 6.2 mi

Top 49%
×5story building
+79ft-138ft

Overall

13890

Females

3891

F18-39

3891

10K→15K

6.2 - 9.3 mi

Top 50%
×3story building
+67ft-78ft

Overall

14334

Females

4222

F18-39

4222

15K→20K

9.3 - 12.4 mi

Top 49%
×5story building
+106ft-86ft

Overall

13973

Females

4079

F18-39

4079

20K→Half

12.4 - 13.1 mi

Top 44%
×2story building
+19ft-37ft

Overall

12621

Females

3305

F18-39

3305

Half→25K

13.1 - 15.5 mi

Top 44%
×4story building
+66ft-88ft

Overall

12399

Females

3339

F18-39

3339

25K→30K

15.5 - 18.6 mi

Top 47%
×9story building
+181ft-148ft

Overall

13387

Females

4045

F18-39

4045

30K→20M

18.6 - 20.0 mi

Top 44%
×5story building
+64ft-50ft

Overall

12607

Females

3754

F18-39

3754

20M→21M

20.0 - 21.0 mi

Top 41%
×8story building
+106ft-24ft

Overall

11508

Females

3363

F18-39

3363

21M→35K

21.0 - 21.8 mi

Top 49%
×7story building
+17ft-86ft

Overall

13914

Females

4626

F18-39

4626

35K→23M

21.8 - 23.0 mi

Top 46%
×5story building
+23ft-63ft

Overall

12940

Females

4234

F18-39

4234

23M→24M

23.0 - 24.0 mi

Top 38%
×6story building
+12ft-82ft

Overall

10920

Females

3262

F18-39

3262

24M→40K

24.0 - 24.9 mi

Top 41%
×1story
+6ft-20ft

Overall

11741

Females

3776

F18-39

3776

40K→25.2M

24.9 - 25.2 mi

Top 34%
×1story
+13ft-16ft

Overall

9536

Females

2813

F18-39

2813

25.2M→Finish

25.2 - 26.2 mi

Top 32%
×2story building
+22ft-21ft

Overall

9054

Females

2572

F18-39

2572

Passing Analysis

Category:
Athletes Passed
2256
Passed By
1550
Net Change
+706
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13438
5K → 10K195424-229#13438#13667
10K → 15K134311-177#13667#13844
15K → 20K215223-8#13844#13852
20K → Half943+91#13852#13761
Half → 25K31436+278#13761#13483
25K → 30K264215+49#13483#13434
30K → 20M16067+93#13434#13341
20M → 21M18831+157#13341#13184
21M → 35K5167-16#13184#13200
35K → 23M12598+27#13200#13173
23M → 24M14116+125#13173#13048
24M → 40K10540+65#13048#12983
40K → 25.2M679+58#12983#12925
25.2M → Finish20310+193#12925#12732
TOTALS22561550+706
📊

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