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BOSTON MARATHON 2023

Brian Dunfey

Bib: 15778•M

CO

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M60-64)
#0 / 1110
Top 40%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ 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
8:29/mi
26:21
↑ 97↓ 3451.5%
10K· 6.21 mi
8:25/mi
52:31
↑ 79↓ 1380.4%
15K· 9.32 mi
8:56/mi
1:20:15
↑ 67↓ 78
20K· 12.43 mi
8:45/mi
1:47:25
↑ 106↓ 860.1%
Half· 13.11 mi
8:26/mi
1:53:10
↑ 19↓ 370.5%
25K· 15.53 mi
8:18/mi
2:13:18
↑ 66↓ 880.2%
30K· 18.64 mi
8:31/mi
2:39:46
↑ 181↓ 1480.2%
20M
8:35/mi
2:51:26
↑ 64↓ 500.2%
21M
9:20/mi
3:00:46
↑ 106↓ 241.6%
35K· 21.75 mi
8:16/mi
3:06:57
↑ 17↓ 861.7%
23M
8:35/mi
3:17:42
↑ 23↓ 630.6%
24M
7:56/mi
3:25:38
↓ 821.3%
40K· 24.85 mi
8:40/mi
3:33:03
↓ 200.3%
25.2M
9:28/mi
3:36:19
↑ 13↓ 160.2%
Finish· 26.22 mi
8:41/mi
3:45:10
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:53:10
Pace8:38 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:52:00
Pace8:33 /mi
📊Negative Split: 1.0% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:56:3526:218:2926:21
8:29
-
10K
6.21 mi11:22:4552:318:2726:10
8:25
-0:04
15K
9.32 mi11:50:291:20:158:3727:44
8:56
+0:31
20K
12.43 mi12:17:391:47:258:3927:10
8:45
-0:11
Half
13.11 mi12:23:241:53:108:385:45
8:26
-0:19
25K
15.53 mi12:43:322:13:188:3520:08
8:18
-0:08
30K
18.64 mi13:10:002:39:468:3426:28
8:31
+0:13
20M
20.00 mi13:21:402:51:268:3411:40
8:35
+0:04
21M
21.00 mi13:31:003:00:468:369:20
9:20
+0:45
35K
21.75 mi13:37:113:06:578:366:11
8:16
-1:04
23M
23.00 mi13:47:563:17:428:3610:45
8:35
+0:19
24M
24.00 mi13:55:523:25:388:347:56
7:56
-0:39
40K
24.85 mi14:03:173:33:038:347:25
8:40
+0:44
25.2M
25.20 mi14:06:333:36:198:353:16
9:28
+0:48
Finish
26.22 mi14:15:243:45:108:368:51
8:41
-0:47

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

7:56 /mi

Average Pace

8:36 /mi

Slowest Pace

9:28 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:37:40

70% of race

Time at Steady Pace

1:04:14

29% of race

Time at Slower Pace

3:16

1% of race

Average Pace: 8:35 /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 mi10:56:3526:218:2926:21
8:29
#17421
10K
6.21 mi11:22:4552:318:2726:10
8:25
#17557
15K
9.32 mi11:50:291:20:158:3727:44
8:56
#18531
20K
12.43 mi12:17:391:47:258:3927:10
8:45
#18478
Half
13.11 mi12:23:241:53:108:385:45
8:26
#18392
25K
15.53 mi12:43:322:13:188:3520:08
8:18
#17823
30K
18.64 mi13:10:002:39:468:3426:28
8:31
#17182
20M
20.00 mi13:21:402:51:268:3411:40
8:35
#16953
21M
21.00 mi13:31:003:00:468:369:20
9:20
#16852
35K
21.75 mi13:37:113:06:578:366:11
8:16
#16730
23M
23.00 mi13:47:563:17:428:3610:45
8:35
#16564
24M
24.00 mi13:55:523:25:388:347:56
7:56
#16295
40K
24.85 mi14:03:173:33:038:347:25
8:40
#16209
25.2M
25.20 mi14:06:333:36:198:353:16
9:28
#16191
Finish
26.22 mi14:15:243:45:108:368:51
8:41
#16213
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi17421111971119720158(Top 76%)12377(Top 82%)12377(Top 1115%)
10K6.21 mi3.10 mi17557-13611276-7911276-7917710(Top 67%)11373(Top 75%)11373(Top 1025%)
15K9.32 mi3.11 mi18531-97411674-39811674-39820158(Top 76%)12377(Top 82%)12377(Top 1115%)
20K12.43 mi3.11 mi18478+5311669+511669+518366(Top 69%)11626(Top 77%)11626(Top 1047%)
Half13.11 mi0.68 mi18392+8611632+3711632+3717248(Top 65%)11179(Top 74%)11179(Top 1007%)
25K15.53 mi2.42 mi17823+56911369+26311369+26314975(Top 56%)10140(Top 67%)10140(Top 914%)
30K18.64 mi3.11 mi17182+64111093+27611093+27614439(Top 54%)9838(Top 65%)9838(Top 886%)
20M20.00 mi1.36 mi16953+22910991+10210991+10214154(Top 53%)9636(Top 63%)9636(Top 868%)
21M21.00 mi1.00 mi16852+10110935+5610935+5615166(Top 57%)10001(Top 66%)10001(Top 901%)
35K21.75 mi0.75 mi16730+12210872+6310872+6313885(Top 52%)9374(Top 62%)9374(Top 845%)
23M23.00 mi1.25 mi16564+16610777+9510777+9513720(Top 52%)9248(Top 61%)9248(Top 833%)
24M24.00 mi1.00 mi16295+26910646+13110646+13110781(Top 40%)7804(Top 51%)7804(Top 703%)
40K24.85 mi0.85 mi16209+8610589+5710589+5714358(Top 54%)9400(Top 62%)9400(Top 847%)
25.2M25.20 mi0.35 mi16191+1810579+1010579+1015021(Top 56%)9697(Top 64%)9697(Top 874%)
Finish26.22 mi1.02 mi16213-22105791057916382(Top 62%)10327(Top 68%)10327(Top 930%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 76%
×21story building
+97ft-345ft

Overall

20158

Males

12377

M60-64

12377

5K→10K

3.1 - 6.2 mi

Top 67%
×5story building
+79ft-138ft

Overall

17710

Males

11373

M60-64

11373

10K→15K

6.2 - 9.3 mi

Top 76%
×3story building
+67ft-78ft

Overall

20158

Males

12377

M60-64

12377

15K→20K

9.3 - 12.4 mi

Top 69%
×5story building
+106ft-86ft

Overall

18366

Males

11626

M60-64

11626

20K→Half

12.4 - 13.1 mi

Top 65%
×2story building
+19ft-37ft

Overall

17248

Males

11179

M60-64

11179

Half→25K

13.1 - 15.5 mi

Top 56%
×4story building
+66ft-88ft

Overall

14975

Males

10140

M60-64

10140

25K→30K

15.5 - 18.6 mi

Top 54%
×9story building
+181ft-148ft

Overall

14439

Males

9838

M60-64

9838

30K→20M

18.6 - 20.0 mi

Top 53%
×5story building
+64ft-50ft

Overall

14154

Males

9636

M60-64

9636

20M→21M

20.0 - 21.0 mi

Top 57%
×8story building
+106ft-24ft

Overall

15166

Males

10001

M60-64

10001

21M→35K

21.0 - 21.8 mi

Top 52%
×7story building
+17ft-86ft

Overall

13885

Males

9374

M60-64

9374

35K→23M

21.8 - 23.0 mi

Top 52%
×5story building
+23ft-63ft

Overall

13720

Males

9248

M60-64

9248

23M→24M

23.0 - 24.0 mi

Top 40%
×6story building
+12ft-82ft

Overall

10781

Males

7804

M60-64

7804

24M→40K

24.0 - 24.9 mi

Top 54%
×1story
+6ft-20ft

Overall

14358

Males

9400

M60-64

9400

40K→25.2M

24.9 - 25.2 mi

Top 56%
×1story
+13ft-16ft

Overall

15021

Males

9697

M60-64

9697

25.2M→Finish

25.2 - 26.2 mi

Top 62%
×2story building
+22ft-21ft

Overall

16382

Males

10327

M60-64

10327

Passing Analysis

Category:
Athletes Passed
2886
Passed By
1678
Net Change
+1208
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17421
5K → 10K230366-136#17421#17557
10K → 15K261000-974#17557#18531
15K → 20K182129+53#18531#18478
20K → Half926+86#18478#18392
Half → 25K5690+569#18392#17823
25K → 30K6498+641#17823#17182
30K → 20M2356+229#17182#16953
20M → 21M13130+101#16953#16852
21M → 35K1242+122#16852#16730
35K → 23M18014+166#16730#16564
23M → 24M2701+269#16564#16295
24M → 40K10822+86#16295#16209
40K → 25.2M3618+18#16209#16191
25.2M → Finish5476-22#16191#16213
TOTALS28861678+1208
📊

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