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BOSTON MARATHON 2025

Erin Corbyn

Bib: 19268•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 46%
Gender (Female)
#0 / 12228
Top 31%
Masters (Masters Women)
#0 / 6759
Top 16%
Division (F40-44)
#0 / 1718
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
7:51/mi
24:23
↑ 97↓ 3451.5%
10K· 6.21 mi
7:46/mi
48:30
↑ 79↓ 1380.4%
15K· 9.32 mi
7:55/mi
1:13:06
↑ 67↓ 78
20K· 12.43 mi
7:55/mi
1:37:42
↑ 106↓ 860.1%
Half· 13.11 mi
7:48/mi
1:43:01
↑ 19↓ 370.5%
25K· 15.53 mi
7:57/mi
2:02:18
↑ 66↓ 880.2%
30K· 18.64 mi
8:11/mi
2:27:42
↑ 181↓ 1480.2%
20M
8:17/mi
2:38:57
↑ 64↓ 500.2%
21M
8:47/mi
2:47:44
↑ 106↓ 241.6%
35K· 21.75 mi
8:05/mi
2:53:47
↑ 17↓ 861.7%
23M
8:05/mi
3:03:54
↑ 23↓ 630.6%
24M
7:50/mi
3:11:44
↓ 821.3%
40K· 24.85 mi
8:02/mi
3:18:36
↓ 200.3%
25.2M
8:48/mi
3:21:38
↑ 13↓ 160.2%
Finish· 26.22 mi
7:49/mi
3:29:36
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:43:01
Pace7:51 /mi
2nd Half
Distance13.11 mi
Time1:46:35
Pace8:08 /mi
📊Positive Split: 3.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:0424:237:5124:23
7:51
-
10K
6.21 mi11:41:1148:307:4824:07
7:46
-0:05
15K
9.32 mi12:05:471:13:067:5124:36
7:55
+0:09
20K
12.43 mi12:30:231:37:427:5224:36
7:55
0:00
Half
13.11 mi12:35:421:43:017:515:19
7:48
-0:07
25K
15.53 mi12:54:592:02:187:5219:17
7:57
+0:09
30K
18.64 mi13:20:232:27:427:5525:24
8:11
+0:14
20M
20.00 mi13:31:382:38:577:5711:15
8:17
+0:06
21M
21.00 mi13:40:252:47:447:598:47
8:47
+0:30
35K
21.75 mi13:46:282:53:477:596:03
8:05
-0:42
23M
23.00 mi13:56:353:03:548:0010:07
8:05
0:00
24M
24.00 mi14:04:253:11:447:597:50
7:50
-0:15
40K
24.85 mi14:11:173:18:367:596:52
8:02
+0:12
25.2M
25.20 mi14:14:193:21:388:003:02
8:48
+0:46
Finish
26.22 mi14:22:173:29:368:007:58
7:49
-0:59

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

7:46 /mi

Average Pace

8:00 /mi

Slowest Pace

8:48 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:17:47

94% of race

Time at Steady Pace

11:49

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:00 /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 mi11:17:0424:237:5124:23
7:51
#15236
10K
6.21 mi11:41:1148:307:4824:07
7:46
#14832
15K
9.32 mi12:05:471:13:067:5124:36
7:55
#15011
20K
12.43 mi12:30:231:37:427:5224:36
7:55
#14764
Half
13.11 mi12:35:421:43:017:515:19
7:48
#14735
25K
15.53 mi12:54:592:02:187:5219:17
7:57
#14493
30K
18.64 mi13:20:232:27:427:5525:24
8:11
#14064
20M
20.00 mi13:31:382:38:577:5711:15
8:17
#13896
21M
21.00 mi13:40:252:47:447:598:47
8:47
#13766
35K
21.75 mi13:46:282:53:477:596:03
8:05
#13704
23M
23.00 mi13:56:353:03:548:0010:07
8:05
#13475
24M
24.00 mi14:04:253:11:447:597:50
7:50
#13324
40K
24.85 mi14:11:173:18:367:596:52
8:02
#13196
25.2M
25.20 mi14:14:193:21:388:003:02
8:48
#13153
Finish
26.22 mi14:22:173:29:368:007:58
7:49
#13112
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi152364671467115374(Top 54%)4790(Top 39%)4790(Top 279%)
10K6.21 mi3.10 mi14832+4044446+2254446+22514462(Top 51%)4220(Top 35%)4220(Top 246%)
15K9.32 mi3.11 mi15011-1794561-1154561-11515374(Top 54%)4790(Top 39%)4790(Top 279%)
20K12.43 mi3.11 mi14764+2474449+1124449+11214253(Top 50%)4217(Top 34%)4217(Top 245%)
Half13.11 mi0.68 mi14735+294429+204429+2014196(Top 50%)4148(Top 34%)4148(Top 241%)
25K15.53 mi2.42 mi14493+2424330+994330+9913533(Top 48%)3955(Top 32%)3955(Top 230%)
30K18.64 mi3.11 mi14064+4294142+1884142+18812639(Top 44%)3633(Top 30%)3633(Top 211%)
20M20.00 mi1.36 mi13896+1684086+564086+5612350(Top 43%)3614(Top 30%)3614(Top 210%)
21M21.00 mi1.00 mi13766+1304038+484038+4812197(Top 43%)3694(Top 30%)3694(Top 215%)
35K21.75 mi0.75 mi13704+624026+124026+1212767(Top 45%)4050(Top 33%)4050(Top 236%)
23M23.00 mi1.25 mi13475+2293942+843942+8410661(Top 38%)3079(Top 25%)3079(Top 179%)
24M24.00 mi1.00 mi13324+1513878+643878+6410061(Top 35%)2825(Top 23%)2825(Top 164%)
40K24.85 mi0.85 mi13196+1283834+443834+4410427(Top 37%)3127(Top 26%)3127(Top 182%)
25.2M25.20 mi0.35 mi13153+433825+93825+910622(Top 37%)3278(Top 27%)3278(Top 191%)
Finish26.22 mi1.02 mi13112+413826-13826-111571(Top 41%)3724(Top 30%)3724(Top 217%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 54%
×21story building
+97ft-345ft

Overall

15374

Females

4790

F40-44

4790

5K→10K

3.1 - 6.2 mi

Top 51%
×5story building
+79ft-138ft

Overall

14462

Females

4220

F40-44

4220

10K→15K

6.2 - 9.3 mi

Top 54%
×3story building
+67ft-78ft

Overall

15374

Females

4790

F40-44

4790

15K→20K

9.3 - 12.4 mi

Top 50%
×5story building
+106ft-86ft

Overall

14253

Females

4217

F40-44

4217

20K→Half

12.4 - 13.1 mi

Top 50%
×2story building
+19ft-37ft

Overall

14196

Females

4148

F40-44

4148

Half→25K

13.1 - 15.5 mi

Top 48%
×4story building
+66ft-88ft

Overall

13533

Females

3955

F40-44

3955

25K→30K

15.5 - 18.6 mi

Top 44%
×9story building
+181ft-148ft

Overall

12639

Females

3633

F40-44

3633

30K→20M

18.6 - 20.0 mi

Top 43%
×5story building
+64ft-50ft

Overall

12350

Females

3614

F40-44

3614

20M→21M

20.0 - 21.0 mi

Top 43%
×8story building
+106ft-24ft

Overall

12197

Females

3694

F40-44

3694

21M→35K

21.0 - 21.8 mi

Top 45%
×7story building
+17ft-86ft

Overall

12767

Females

4050

F40-44

4050

35K→23M

21.8 - 23.0 mi

Top 38%
×5story building
+23ft-63ft

Overall

10661

Females

3079

F40-44

3079

23M→24M

23.0 - 24.0 mi

Top 35%
×6story building
+12ft-82ft

Overall

10061

Females

2825

F40-44

2825

24M→40K

24.0 - 24.9 mi

Top 37%
×1story
+6ft-20ft

Overall

10427

Females

3127

F40-44

3127

40K→25.2M

24.9 - 25.2 mi

Top 37%
×1story
+13ft-16ft

Overall

10622

Females

3278

F40-44

3278

25.2M→Finish

25.2 - 26.2 mi

Top 41%
×2story building
+22ft-21ft

Overall

11571

Females

3724

F40-44

3724

Passing Analysis

Category:
Athletes Passed
2984
Passed By
860
Net Change
+2124
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15236
5K → 10K529125+404#15236#14832
10K → 15K143322-179#14832#15011
15K → 20K33184+247#15011#14764
20K → Half4718+29#14764#14735
Half → 25K29957+242#14735#14493
25K → 30K48455+429#14493#14064
30K → 20M20133+168#14064#13896
20M → 21M17343+130#13896#13766
21M → 35K8422+62#13766#13704
35K → 23M24819+229#13704#13475
23M → 24M16211+151#13475#13324
24M → 40K14517+128#13324#13196
40K → 25.2M5310+43#13196#13153
25.2M → Finish8544+41#13153#13112
TOTALS2984860+2124
📊

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