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BOSTON MARATHON 2023

Danny Shaffield

Bib: 11594•M

AL

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M50-54)
#0 / 2052
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
7:31/mi
23:21
↑ 97↓ 3451.5%
10K· 6.21 mi
7:20/mi
46:08
↑ 79↓ 1380.4%
15K· 9.32 mi
7:28/mi
1:09:19
↑ 67↓ 78
20K· 12.43 mi
7:51/mi
1:33:43
↑ 106↓ 860.1%
Half· 13.11 mi
7:55/mi
1:39:07
↑ 19↓ 370.5%
25K· 15.53 mi
8:48/mi
2:00:27
↑ 66↓ 880.2%
30K· 18.64 mi
9:19/mi
2:29:24
↑ 181↓ 1480.2%
20M
9:46/mi
2:42:40
↑ 64↓ 500.2%
21M
11:45/mi
2:54:25
↑ 106↓ 241.6%
35K· 21.75 mi
9:11/mi
3:01:17
↑ 17↓ 861.7%
23M
11:56/mi
3:16:13
↑ 23↓ 630.6%
24M
10:06/mi
3:26:19
↓ 821.3%
40K· 24.85 mi
10:49/mi
3:35:34
↓ 200.3%
25.2M
9:37/mi
3:38:53
↑ 13↓ 160.2%
Finish· 26.22 mi
8:58/mi
3:48:01
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:39:07
Pace7:34 /mi
2nd Half
Distance13.11 mi
Time2:08:54
Pace9:50 /mi
📊Positive Split: 30.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:50:2423:217:3123:21
7:31
-
10K
6.21 mi11:13:1146:087:2522:47
7:20
-0:11
15K
9.32 mi11:36:221:09:197:2623:11
7:28
+0:08
20K
12.43 mi12:00:461:33:437:3224:24
7:51
+0:23
Half
13.11 mi12:06:101:39:077:345:24
7:55
+0:04
25K
15.53 mi12:27:302:00:277:4521:20
8:48
+0:53
30K
18.64 mi12:56:272:29:248:0128:57
9:19
+0:31
20M
20.00 mi13:09:432:42:408:0813:16
9:46
+0:27
21M
21.00 mi13:21:282:54:258:1811:45
11:45
+1:59
35K
21.75 mi13:28:203:01:178:206:52
9:11
-2:34
23M
23.00 mi13:43:163:16:138:3214:56
11:56
+2:45
24M
24.00 mi13:53:223:26:198:3610:06
10:06
-1:50
40K
24.85 mi14:02:373:35:348:409:15
10:49
+0:43
25.2M
25.20 mi14:05:563:38:538:413:19
9:37
-1:12
Finish
26.22 mi14:15:043:48:018:429:08
8:58
-0:39

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

7:20 /mi

Average Pace

8:42 /mi

Slowest Pace

11:56 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:39:07

43% of race

Time at Steady Pace

1:22:52

36% of race

Time at Slower Pace

46:02

20% of race

Average Pace: 8:42 /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 mi10:50:2423:217:3123:21
7:31
#9758
10K
6.21 mi11:13:1146:087:2522:47
7:20
#9373
15K
9.32 mi11:36:221:09:197:2623:11
7:28
#9499
20K
12.43 mi12:00:461:33:437:3224:24
7:51
#10202
Half
13.11 mi12:06:101:39:077:345:24
7:55
#10379
25K
15.53 mi12:27:302:00:277:4521:20
8:48
#11755
30K
18.64 mi12:56:272:29:248:0128:57
9:19
#13401
20M
20.00 mi13:09:432:42:408:0813:16
9:46
#14104
21M
21.00 mi13:21:282:54:258:1811:45
11:45
#14920
35K
21.75 mi13:28:203:01:178:206:52
9:11
#15084
23M
23.00 mi13:43:163:16:138:3214:56
11:56
#16146
24M
24.00 mi13:53:223:26:198:3610:06
10:06
#16491
40K
24.85 mi14:02:373:35:348:409:15
10:49
#16835
25.2M
25.20 mi14:05:563:38:538:413:19
9:37
#16815
Finish
26.22 mi14:15:043:48:018:429:08
8:58
#16855
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi9758801680169878(Top 37%)8080(Top 53%)8080(Top 394%)
10K6.21 mi3.10 mi9373+3857805+2117805+2119104(Top 34%)7644(Top 50%)7644(Top 373%)
15K9.32 mi3.11 mi9499-1267874-697874-699878(Top 37%)8080(Top 53%)8080(Top 394%)
20K12.43 mi3.11 mi10202-7038263-3898263-38912193(Top 46%)9100(Top 60%)9100(Top 443%)
Half13.11 mi0.68 mi10379-1778348-858348-8513676(Top 51%)9786(Top 64%)9786(Top 477%)
25K15.53 mi2.42 mi11755-13768949-6018949-60117923(Top 67%)11379(Top 75%)11379(Top 555%)
30K18.64 mi3.11 mi13401-16469605-6569605-65618696(Top 70%)11645(Top 77%)11645(Top 567%)
20M20.00 mi1.36 mi14104-7039857-2529857-25219731(Top 74%)11988(Top 79%)11988(Top 584%)
21M21.00 mi1.00 mi14920-81610161-30410161-30422309(Top 84%)13114(Top 86%)13114(Top 639%)
35K21.75 mi0.75 mi15084-16410196-3510196-3518629(Top 70%)11422(Top 75%)11422(Top 557%)
23M23.00 mi1.25 mi16146-106210592-39610592-39623882(Top 90%)13802(Top 91%)13802(Top 673%)
24M24.00 mi1.00 mi16491-34510727-13510727-13521053(Top 79%)12451(Top 82%)12451(Top 607%)
40K24.85 mi0.85 mi16835-34410847-12010847-12021957(Top 82%)12804(Top 84%)12804(Top 624%)
25.2M25.20 mi0.35 mi16815+2010839+810839+815707(Top 59%)9995(Top 66%)9995(Top 487%)
Finish26.22 mi1.02 mi16855-4010843-410843-417768(Top 67%)10952(Top 72%)10952(Top 534%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 37%
×21story building
+97ft-345ft

Overall

9878

Males

8080

M50-54

8080

5K→10K

3.1 - 6.2 mi

Top 34%
×5story building
+79ft-138ft

Overall

9104

Males

7644

M50-54

7644

10K→15K

6.2 - 9.3 mi

Top 37%
×3story building
+67ft-78ft

Overall

9878

Males

8080

M50-54

8080

15K→20K

9.3 - 12.4 mi

Top 46%
×5story building
+106ft-86ft

Overall

12193

Males

9100

M50-54

9100

20K→Half

12.4 - 13.1 mi

Top 51%
×2story building
+19ft-37ft

Overall

13676

Males

9786

M50-54

9786

Half→25K

13.1 - 15.5 mi

Top 67%
×4story building
+66ft-88ft

Overall

17923

Males

11379

M50-54

11379

25K→30K

15.5 - 18.6 mi

Top 70%
×9story building
+181ft-148ft

Overall

18696

Males

11645

M50-54

11645

30K→20M

18.6 - 20.0 mi

Top 74%
×5story building
+64ft-50ft

Overall

19731

Males

11988

M50-54

11988

20M→21M

20.0 - 21.0 mi

Top 84%
×8story building
+106ft-24ft

Overall

22309

Males

13114

M50-54

13114

21M→35K

21.0 - 21.8 mi

Top 70%
×7story building
+17ft-86ft

Overall

18629

Males

11422

M50-54

11422

35K→23M

21.8 - 23.0 mi

Top 90%
×5story building
+23ft-63ft

Overall

23882

Males

13802

M50-54

13802

23M→24M

23.0 - 24.0 mi

Top 79%
×6story building
+12ft-82ft

Overall

21053

Males

12451

M50-54

12451

24M→40K

24.0 - 24.9 mi

Top 82%
×1story
+6ft-20ft

Overall

21957

Males

12804

M50-54

12804

40K→25.2M

24.9 - 25.2 mi

Top 59%
×1story
+13ft-16ft

Overall

15707

Males

9995

M50-54

9995

25.2M→Finish

25.2 - 26.2 mi

Top 67%
×2story building
+22ft-21ft

Overall

17768

Males

10952

M50-54

10952

Passing Analysis

Category:
Athletes Passed
844
Passed By
7940
Net Change
-7097
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9758
5K → 10K519134+385#9758#9373
10K → 15K112238-126#9373#9499
15K → 20K35737-703#9499#10202
20K → Half1178-177#10202#10379
Half → 25K91385-1376#10379#11755
25K → 30K151661-1646#11755#13401
30K → 20M11714-703#13401#14104
20M → 21M4820-816#14104#14920
21M → 35K18182-164#14920#15084
35K → 23M21064-1062#15084#16146
23M → 24M11356-345#16146#16491
24M → 40K11355-344#16491#16835
40K → 25.2M3818+20#16835#16815
25.2M → Finish5898-40#16815#16855
TOTALS8447940-7097
📊

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