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BOSTON MARATHON 2025

Greg Dundas

Bib: 1517•M

TX

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 2%
Gender (Male)
#0 / 16105
Top 4%
Division (M18-39)
#0 / 5642
Top 10%
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
5:59/mi
18:35
↑ 97↓ 3451.5%
10K· 6.21 mi
5:57/mi
37:03
↑ 79↓ 1380.4%
15K· 9.32 mi
5:58/mi
55:36
↑ 67↓ 78
20K· 12.43 mi
6:00/mi
1:14:14
↑ 106↓ 860.1%
Half· 13.11 mi
5:49/mi
1:18:12
↑ 19↓ 370.5%
25K· 15.53 mi
5:59/mi
1:32:42
↑ 66↓ 880.2%
30K· 18.64 mi
6:06/mi
1:51:40
↑ 181↓ 1480.2%
20M
6:06/mi
1:59:58
↑ 64↓ 500.2%
21M
6:26/mi
2:06:24
↑ 106↓ 241.6%
35K· 21.75 mi
5:58/mi
2:10:52
↑ 17↓ 861.7%
23M
6:11/mi
2:18:36
↑ 23↓ 630.6%
24M
6:07/mi
2:24:43
↓ 821.3%
40K· 24.85 mi
6:18/mi
2:30:06
↓ 200.3%
25.2M
6:46/mi
2:32:26
↑ 13↓ 160.2%
Finish· 26.22 mi
6:03/mi
2:38:36
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:18:12
Pace5:58 /mi
2nd Half
Distance13.11 mi
Time1:20:24
Pace6:08 /mi
📊Positive Split: 2.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:19:0718:355:5918:35
5:59
-
10K
6.21 mi10:37:3537:035:5818:28
5:57
-0:02
15K
9.32 mi10:56:0855:365:5818:33
5:58
+0:01
20K
12.43 mi11:14:461:14:145:5818:38
6:00
+0:02
Half
13.11 mi11:18:441:18:125:583:58
5:49
-0:11
25K
15.53 mi11:33:141:32:425:5814:30
5:59
+0:10
30K
18.64 mi11:52:121:51:405:5918:58
6:06
+0:07
20M
20.00 mi12:00:301:59:586:008:18
6:06
0:00
21M
21.00 mi12:06:562:06:246:016:26
6:26
+0:20
35K
21.75 mi12:11:242:10:526:014:28
5:58
-0:28
23M
23.00 mi12:19:082:18:366:027:44
6:11
+0:13
24M
24.00 mi12:25:152:24:436:026:07
6:07
-0:04
40K
24.85 mi12:30:382:30:066:025:23
6:18
+0:11
25.2M
25.20 mi12:32:582:32:266:032:20
6:46
+0:28
Finish
26.22 mi12:39:082:38:366:036:10
6:03
-0:43

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

5:49 /mi

Average Pace

6:03 /mi

Slowest Pace

6:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:29:50

94% of race

Time at Steady Pace

8:46

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:03 /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 mi10:19:0718:355:5918:35
5:59
#1020
10K
6.21 mi10:37:3537:035:5818:28
5:57
#980
15K
9.32 mi10:56:0855:365:5818:33
5:58
#961
20K
12.43 mi11:14:461:14:145:5818:38
6:00
#928
Half
13.11 mi11:18:441:18:125:583:58
5:49
#906
25K
15.53 mi11:33:141:32:425:5814:30
5:59
#868
30K
18.64 mi11:52:121:51:405:5918:58
6:06
#802
20M
20.00 mi12:00:301:59:586:008:18
6:06
#770
21M
21.00 mi12:06:562:06:246:016:26
6:26
#745
35K
21.75 mi12:11:242:10:526:014:28
5:58
#726
23M
23.00 mi12:19:082:18:366:027:44
6:11
#701
24M
24.00 mi12:25:152:24:436:026:07
6:07
#694
40K
24.85 mi12:30:382:30:066:025:23
6:18
#686
25.2M
25.20 mi12:32:582:32:266:032:20
6:46
#684
Finish
26.22 mi12:39:082:38:366:036:10
6:03
#686
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi1020961961939(Top 3%)886(Top 6%)886(Top 16%)
10K6.21 mi3.10 mi980+40922+39922+39944(Top 3%)889(Top 6%)889(Top 16%)
15K9.32 mi3.11 mi961+19905+17905+17939(Top 3%)886(Top 6%)886(Top 16%)
20K12.43 mi3.11 mi928+33873+32873+32858(Top 3%)807(Top 5%)807(Top 14%)
Half13.11 mi0.68 mi906+22853+20853+20617(Top 2%)578(Top 4%)578(Top 10%)
25K15.53 mi2.42 mi868+38816+37816+37742(Top 3%)694(Top 4%)694(Top 12%)
30K18.64 mi3.11 mi802+66752+64752+64691(Top 2%)647(Top 4%)647(Top 11%)
20M20.00 mi1.36 mi770+32721+31721+31548(Top 2%)515(Top 3%)515(Top 9%)
21M21.00 mi1.00 mi745+25697+24697+24560(Top 2%)528(Top 3%)528(Top 9%)
35K21.75 mi0.75 mi726+19678+19678+19661(Top 2%)618(Top 4%)618(Top 11%)
23M23.00 mi1.25 mi701+25653+25653+25627(Top 2%)591(Top 4%)591(Top 10%)
24M24.00 mi1.00 mi694+7645+8645+8800(Top 3%)752(Top 5%)752(Top 13%)
40K24.85 mi0.85 mi686+8637+8637+8943(Top 3%)882(Top 5%)882(Top 16%)
25.2M25.20 mi0.35 mi684+2635+2635+2857(Top 3%)790(Top 5%)790(Top 14%)
Finish26.22 mi1.02 mi686-2637-2637-21043(Top 4%)977(Top 6%)977(Top 17%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 3%
×21story building
+97ft-345ft

Overall

939

Males

886

M18-39

886

5K→10K

3.1 - 6.2 mi

Top 3%
×5story building
+79ft-138ft

Overall

944

Males

889

M18-39

889

10K→15K

6.2 - 9.3 mi

Top 3%
×3story building
+67ft-78ft

Overall

939

Males

886

M18-39

886

15K→20K

9.3 - 12.4 mi

Top 3%
×5story building
+106ft-86ft

Overall

858

Males

807

M18-39

807

20K→Half

12.4 - 13.1 mi

Top 2%
×2story building
+19ft-37ft

Overall

617

Males

578

M18-39

578

Half→25K

13.1 - 15.5 mi

Top 3%
×4story building
+66ft-88ft

Overall

742

Males

694

M18-39

694

25K→30K

15.5 - 18.6 mi

Top 2%
×9story building
+181ft-148ft

Overall

691

Males

647

M18-39

647

30K→20M

18.6 - 20.0 mi

Top 2%
×5story building
+64ft-50ft

Overall

548

Males

515

M18-39

515

20M→21M

20.0 - 21.0 mi

Top 2%
×8story building
+106ft-24ft

Overall

560

Males

528

M18-39

528

21M→35K

21.0 - 21.8 mi

Top 2%
×7story building
+17ft-86ft

Overall

661

Males

618

M18-39

618

35K→23M

21.8 - 23.0 mi

Top 2%
×5story building
+23ft-63ft

Overall

627

Males

591

M18-39

591

23M→24M

23.0 - 24.0 mi

Top 3%
×6story building
+12ft-82ft

Overall

800

Males

752

M18-39

752

24M→40K

24.0 - 24.9 mi

Top 3%
×1story
+6ft-20ft

Overall

943

Males

882

M18-39

882

40K→25.2M

24.9 - 25.2 mi

Top 3%
×1story
+13ft-16ft

Overall

857

Males

790

M18-39

790

25.2M→Finish

25.2 - 26.2 mi

Top 4%
×2story building
+22ft-21ft

Overall

1043

Males

977

M18-39

977

Passing Analysis

Category:
Athletes Passed
448
Passed By
114
Net Change
+334
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1020
5K → 10K6626+40#1020#980
10K → 15K3415+19#980#961
15K → 20K5017+33#961#928
20K → Half220+22#928#906
Half → 25K446+38#906#868
25K → 30K759+66#868#802
30K → 20M375+32#802#770
20M → 21M305+25#770#745
21M → 35K201+19#745#726
35K → 23M294+25#726#701
23M → 24M147+7#701#694
24M → 40K157+8#694#686
40K → 25.2M53+2#686#684
25.2M → Finish79-2#684#686
TOTALS448114+334
📊

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