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BOSTON MARATHON 2023

Brian Duffy

Bib: 25843•M

MA

0:00
0:00
/ mi
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Division (M18-39)
#0 / 5285
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
7:15/mi
22:32
↑ 97↓ 3451.5%
10K· 6.21 mi
7:29/mi
45:47
↑ 79↓ 1380.4%
15K· 9.32 mi
7:34/mi
1:09:17
↑ 67↓ 78
20K· 12.43 mi
7:53/mi
1:33:46
↑ 106↓ 860.1%
Half· 13.11 mi
7:58/mi
1:39:12
↑ 19↓ 370.5%
25K· 15.53 mi
8:40/mi
2:00:13
↑ 66↓ 880.2%
30K· 18.64 mi
9:17/mi
2:29:04
↑ 181↓ 1480.2%
20M
9:20/mi
2:41:45
↑ 64↓ 500.2%
21M
10:01/mi
2:51:46
↑ 106↓ 241.6%
35K· 21.75 mi
9:57/mi
2:59:13
↑ 17↓ 861.7%
23M
10:10/mi
3:11:57
↑ 23↓ 630.6%
24M
10:00/mi
3:21:57
↓ 821.3%
40K· 24.85 mi
11:25/mi
3:31:43
↓ 200.3%
25.2M
12:08/mi
3:35:54
↑ 13↓ 160.2%
Finish· 26.22 mi
9:11/mi
3:45:15
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:39:12
Pace7:34 /mi
2nd Half
Distance13.11 mi
Time2:06:03
Pace9:37 /mi
📊Positive Split: 27.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:38:2122:327:1522:32
7:15
-
10K
6.21 mi12:01:3645:477:2223:15
7:29
+0:14
15K
9.32 mi12:25:061:09:177:2623:30
7:34
+0:05
20K
12.43 mi12:49:351:33:467:3324:29
7:53
+0:19
Half
13.11 mi12:55:011:39:127:345:26
7:58
+0:05
25K
15.53 mi13:16:022:00:137:4421:01
8:40
+0:42
30K
18.64 mi13:44:532:29:048:0028:51
9:17
+0:37
20M
20.00 mi13:57:342:41:458:0512:41
9:20
+0:03
21M
21.00 mi14:07:352:51:468:1110:01
10:01
+0:41
35K
21.75 mi14:15:022:59:138:147:27
9:57
-0:04
23M
23.00 mi14:27:463:11:578:2112:44
10:10
+0:13
24M
24.00 mi14:37:463:21:578:2510:00
10:00
-0:10
40K
24.85 mi14:47:323:31:438:319:46
11:25
+1:25
25.2M
25.20 mi14:51:433:35:548:344:11
12:08
+0:43
Finish
26.22 mi15:01:043:45:158:369:21
9:11
-2:57

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

7:15 /mi

Average Pace

8:36 /mi

Slowest Pace

12:08 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:39:12

44% of race

Time at Steady Pace

1:19:21

35% of race

Time at Slower Pace

46:42

21% 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 mi11:38:2122:327:1522:32
7:15
#7816
10K
6.21 mi12:01:3645:477:2223:15
7:29
#8954
15K
9.32 mi12:25:061:09:177:2623:30
7:34
#9460
20K
12.43 mi12:49:351:33:467:3324:29
7:53
#10237
Half
13.11 mi12:55:011:39:127:345:26
7:58
#10432
25K
15.53 mi13:16:022:00:137:4421:01
8:40
#11607
30K
18.64 mi13:44:532:29:048:0028:51
9:17
#13276
20M
20.00 mi13:57:342:41:458:0512:41
9:20
#13725
21M
21.00 mi14:07:352:51:468:1110:01
10:01
#14064
35K
21.75 mi14:15:022:59:138:147:27
9:57
#14461
23M
23.00 mi14:27:463:11:578:2112:44
10:10
#14959
24M
24.00 mi14:37:463:21:578:2510:00
10:00
#15313
40K
24.85 mi14:47:323:31:438:319:46
11:25
#15880
25.2M
25.20 mi14:51:433:35:548:344:11
12:08
#16082
Finish
26.22 mi15:01:043:45:158:369:21
9:11
#16226
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi78166853685310708(Top 40%)8516(Top 56%)8516(Top 161%)
10K6.21 mi3.10 mi8954-11387553-7007553-70010319(Top 39%)8343(Top 55%)8343(Top 158%)
15K9.32 mi3.11 mi9460-5067850-2977850-29710708(Top 40%)8516(Top 56%)8516(Top 161%)
20K12.43 mi3.11 mi10237-7778282-4328282-43212442(Top 47%)9209(Top 61%)9209(Top 174%)
Half13.11 mi0.68 mi10432-1958376-948376-9414061(Top 53%)9944(Top 66%)9944(Top 188%)
25K15.53 mi2.42 mi11607-11758889-5138889-51317191(Top 65%)11055(Top 73%)11055(Top 209%)
30K18.64 mi3.11 mi13276-16699548-6599548-65918545(Top 70%)11577(Top 76%)11577(Top 219%)
20M20.00 mi1.36 mi13725-4499716-1689716-16818139(Top 68%)11297(Top 74%)11297(Top 214%)
21M21.00 mi1.00 mi14064-3399821-1059821-10518075(Top 68%)11246(Top 74%)11246(Top 213%)
35K21.75 mi0.75 mi14461-3979959-1389959-13821143(Top 79%)12553(Top 83%)12553(Top 238%)
23M23.00 mi1.25 mi14959-49810133-17410133-17420474(Top 77%)12234(Top 81%)12234(Top 231%)
24M24.00 mi1.00 mi15313-35410243-11010243-11020768(Top 78%)12327(Top 81%)12327(Top 233%)
40K24.85 mi0.85 mi15880-56710447-20410447-20423082(Top 87%)13352(Top 88%)13352(Top 253%)
25.2M25.20 mi0.35 mi16082-20210542-9510542-9522696(Top 85%)13167(Top 87%)13167(Top 249%)
Finish26.22 mi1.02 mi16226-14410585-4310585-4318783(Top 71%)11435(Top 75%)11435(Top 216%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 40%
×21story building
+97ft-345ft

Overall

10708

Males

8516

M18-39

8516

5K→10K

3.1 - 6.2 mi

Top 39%
×5story building
+79ft-138ft

Overall

10319

Males

8343

M18-39

8343

10K→15K

6.2 - 9.3 mi

Top 40%
×3story building
+67ft-78ft

Overall

10708

Males

8516

M18-39

8516

15K→20K

9.3 - 12.4 mi

Top 47%
×5story building
+106ft-86ft

Overall

12442

Males

9209

M18-39

9209

20K→Half

12.4 - 13.1 mi

Top 53%
×2story building
+19ft-37ft

Overall

14061

Males

9944

M18-39

9944

Half→25K

13.1 - 15.5 mi

Top 65%
×4story building
+66ft-88ft

Overall

17191

Males

11055

M18-39

11055

25K→30K

15.5 - 18.6 mi

Top 70%
×9story building
+181ft-148ft

Overall

18545

Males

11577

M18-39

11577

30K→20M

18.6 - 20.0 mi

Top 68%
×5story building
+64ft-50ft

Overall

18139

Males

11297

M18-39

11297

20M→21M

20.0 - 21.0 mi

Top 68%
×8story building
+106ft-24ft

Overall

18075

Males

11246

M18-39

11246

21M→35K

21.0 - 21.8 mi

Top 79%
×7story building
+17ft-86ft

Overall

21143

Males

12553

M18-39

12553

35K→23M

21.8 - 23.0 mi

Top 77%
×5story building
+23ft-63ft

Overall

20474

Males

12234

M18-39

12234

23M→24M

23.0 - 24.0 mi

Top 78%
×6story building
+12ft-82ft

Overall

20768

Males

12327

M18-39

12327

24M→40K

24.0 - 24.9 mi

Top 87%
×1story
+6ft-20ft

Overall

23082

Males

13352

M18-39

13352

40K→25.2M

24.9 - 25.2 mi

Top 85%
×1story
+13ft-16ft

Overall

22696

Males

13167

M18-39

13167

25.2M→Finish

25.2 - 26.2 mi

Top 71%
×2story building
+22ft-21ft

Overall

18783

Males

11435

M18-39

11435

Passing Analysis

Category:
Athletes Passed
235
Passed By
8644
Net Change
-8410
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7816
5K → 10K171155-1138#7816#8954
10K → 15K40546-506#8954#9460
15K → 20K31807-777#9460#10237
20K → Half1196-195#10237#10432
Half → 25K151190-1175#10432#11607
25K → 30K171686-1669#11607#13276
30K → 20M16465-449#13276#13725
20M → 21M23362-339#13725#14064
21M → 35K4401-397#14064#14461
35K → 23M12510-498#14461#14959
23M → 24M19373-354#14959#15313
24M → 40K6573-567#15313#15880
40K → 25.2M4206-202#15880#16082
25.2M → Finish30174-144#16082#16226
TOTALS2358644-8410
📊

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