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BOSTON MARATHON 2025

David Ernst

Bib: 20605•M

IL

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M60-64)
#0 / 1259
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
8:07/mi
25:13
↑ 97↓ 3451.5%
10K· 6.21 mi
7:54/mi
49:46
↑ 79↓ 1380.4%
15K· 9.32 mi
8:01/mi
1:14:40
↑ 67↓ 78
20K· 12.43 mi
8:18/mi
1:40:26
↑ 106↓ 860.1%
Half· 13.11 mi
8:20/mi
1:46:07
↑ 19↓ 370.5%
25K· 15.53 mi
8:44/mi
2:07:17
↑ 66↓ 880.2%
30K· 18.64 mi
9:43/mi
2:37:29
↑ 181↓ 1480.2%
20M
10:52/mi
2:52:15
↑ 64↓ 500.2%
21M
12:30/mi
3:04:45
↑ 106↓ 241.6%
35K· 21.75 mi
11:58/mi
3:13:42
↑ 17↓ 861.7%
23M
13:53/mi
3:31:05
↑ 23↓ 630.6%
24M
13:35/mi
3:44:40
↓ 821.3%
40K· 24.85 mi
15:05/mi
3:57:34
↓ 200.3%
25.2M
18:42/mi
4:04:01
↑ 13↓ 160.2%
Finish· 26.22 mi
12:57/mi
4:17:13
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:46:07
Pace8:06 /mi
2nd Half
Distance13.11 mi
Time2:31:06
Pace11:32 /mi
📊Positive Split: 42.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:3625:138:0725:13
8:07
-
10K
6.21 mi11:43:0949:468:0124:33
7:54
-0:13
15K
9.32 mi12:08:031:14:408:0124:54
8:01
+0:07
20K
12.43 mi12:33:491:40:268:0525:46
8:18
+0:17
Half
13.11 mi12:39:301:46:078:065:41
8:20
+0:02
25K
15.53 mi13:00:402:07:178:1221:10
8:44
+0:24
30K
18.64 mi13:30:522:37:298:2730:12
9:43
+0:59
20M
20.00 mi13:45:382:52:158:3714:46
10:52
+1:09
21M
21.00 mi13:58:083:04:458:4812:30
12:30
+1:38
35K
21.75 mi14:07:053:13:428:548:57
11:58
-0:32
23M
23.00 mi14:24:283:31:059:1117:23
13:53
+1:55
24M
24.00 mi14:38:033:44:409:2213:35
13:35
-0:18
40K
24.85 mi14:50:573:57:349:3312:54
15:05
+1:30
25.2M
25.20 mi14:57:244:04:019:416:27
18:42
+3:37
Finish
26.22 mi15:10:364:17:139:4913:12
12:57
-5:45

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

7:54 /mi

Average Pace

9:49 /mi

Slowest Pace

18:42 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:07:17

49% of race

Time at Steady Pace

53:55

21% of race

Time at Slower Pace

1:16:01

30% of race

Average Pace: 9:49 /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 mi11:18:3625:138:0725:13
8:07
#17476
10K
6.21 mi11:43:0949:468:0124:33
7:54
#16589
15K
9.32 mi12:08:031:14:408:0124:54
8:01
#16420
20K
12.43 mi12:33:491:40:268:0525:46
8:18
#16544
Half
13.11 mi12:39:301:46:078:065:41
8:20
#16628
25K
15.53 mi13:00:402:07:178:1221:10
8:44
#16916
30K
18.64 mi13:30:522:37:298:2730:12
9:43
#17777
20M
20.00 mi13:45:382:52:158:3714:46
10:52
#18505
21M
21.00 mi13:58:083:04:458:4812:30
12:30
#19164
35K
21.75 mi14:07:053:13:428:548:57
11:58
#19665
23M
23.00 mi14:24:283:31:059:1117:23
13:53
#20722
24M
24.00 mi14:38:033:44:409:2213:35
13:35
#21363
40K
24.85 mi14:50:573:57:349:3312:54
15:05
#21929
25.2M
25.20 mi14:57:244:04:019:416:27
18:42
#22254
Finish
26.22 mi15:10:364:17:139:4913:12
12:57
#22623
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi17476114121141216149(Top 57%)10876(Top 68%)10876(Top 864%)
10K6.21 mi3.10 mi16589+88711053+35911053+35915674(Top 55%)10704(Top 66%)10704(Top 850%)
15K9.32 mi3.11 mi16420+16910986+6710986+6716149(Top 57%)10876(Top 68%)10876(Top 864%)
20K12.43 mi3.11 mi16544-12411035-4911035-4916902(Top 60%)11138(Top 69%)11138(Top 885%)
Half13.11 mi0.68 mi16628-8411058-2311058-2318104(Top 64%)11694(Top 73%)11694(Top 929%)
25K15.53 mi2.42 mi16916-28811152-9411152-9418577(Top 65%)11788(Top 73%)11788(Top 936%)
30K18.64 mi3.11 mi17777-86111455-30311455-30320747(Top 73%)12613(Top 78%)12613(Top 1002%)
20M20.00 mi1.36 mi18505-72811757-30211757-30223301(Top 82%)13657(Top 85%)13657(Top 1085%)
21M21.00 mi1.00 mi19164-65912019-26212019-26224400(Top 86%)14101(Top 88%)14101(Top 1120%)
35K21.75 mi0.75 mi19665-50112215-19612215-19625806(Top 91%)14730(Top 91%)14730(Top 1170%)
23M23.00 mi1.25 mi20722-105712657-44212657-44227231(Top 96%)15443(Top 96%)15443(Top 1227%)
24M24.00 mi1.00 mi21363-64112933-27612933-27627393(Top 96%)15480(Top 96%)15480(Top 1230%)
40K24.85 mi0.85 mi21929-56613156-22313156-22327802(Top 98%)15721(Top 98%)15721(Top 1249%)
25.2M25.20 mi0.35 mi22254-32513298-14213298-14228288(Top 100%)16022(Top 99%)16022(Top 1273%)
Finish26.22 mi1.02 mi22623-36913436-13813436-13827597(Top 97%)15614(Top 97%)15614(Top 1240%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 57%
×21story building
+97ft-345ft

Overall

16149

Males

10876

M60-64

10876

5K→10K

3.1 - 6.2 mi

Top 55%
×5story building
+79ft-138ft

Overall

15674

Males

10704

M60-64

10704

10K→15K

6.2 - 9.3 mi

Top 57%
×3story building
+67ft-78ft

Overall

16149

Males

10876

M60-64

10876

15K→20K

9.3 - 12.4 mi

Top 60%
×5story building
+106ft-86ft

Overall

16902

Males

11138

M60-64

11138

20K→Half

12.4 - 13.1 mi

Top 64%
×2story building
+19ft-37ft

Overall

18104

Males

11694

M60-64

11694

Half→25K

13.1 - 15.5 mi

Top 65%
×4story building
+66ft-88ft

Overall

18577

Males

11788

M60-64

11788

25K→30K

15.5 - 18.6 mi

Top 73%
×9story building
+181ft-148ft

Overall

20747

Males

12613

M60-64

12613

30K→20M

18.6 - 20.0 mi

Top 82%
×5story building
+64ft-50ft

Overall

23301

Males

13657

M60-64

13657

20M→21M

20.0 - 21.0 mi

Top 86%
×8story building
+106ft-24ft

Overall

24400

Males

14101

M60-64

14101

21M→35K

21.0 - 21.8 mi

Top 91%
×7story building
+17ft-86ft

Overall

25806

Males

14730

M60-64

14730

35K→23M

21.8 - 23.0 mi

Top 96%
×5story building
+23ft-63ft

Overall

27231

Males

15443

M60-64

15443

23M→24M

23.0 - 24.0 mi

Top 96%
×6story building
+12ft-82ft

Overall

27393

Males

15480

M60-64

15480

24M→40K

24.0 - 24.9 mi

Top 98%
×1story
+6ft-20ft

Overall

27802

Males

15721

M60-64

15721

40K→25.2M

24.9 - 25.2 mi

Top 100%
×1story
+13ft-16ft

Overall

28288

Males

16022

M60-64

16022

25.2M→Finish

25.2 - 26.2 mi

Top 97%
×2story building
+22ft-21ft

Overall

27597

Males

15614

M60-64

15614

Passing Analysis

Category:
Athletes Passed
1613
Passed By
6760
Net Change
-5147
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17476
5K → 10K94760+887#17476#16589
10K → 15K287118+169#16589#16420
15K → 20K173297-124#16420#16544
20K → Half1397-84#16544#16628
Half → 25K80368-288#16628#16916
25K → 30K56917-861#16916#17777
30K → 20M21749-728#17777#18505
20M → 21M12671-659#18505#19164
21M → 35K5506-501#19164#19665
35K → 23M81065-1057#19665#20722
23M → 24M2643-641#20722#21363
24M → 40K3569-566#21363#21929
40K → 25.2M0325-325#21929#22254
25.2M → Finish6375-369#22254#22623
TOTALS16136760-5147
📊

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