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BOSTON MARATHON 2023

Chris Shafer

Bib: 17179•M

NJ

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 29%
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
8:25/mi
26:09
↑ 97↓ 3451.5%
10K· 6.21 mi
8:42/mi
53:12
↑ 79↓ 1380.4%
15K· 9.32 mi
8:09/mi
1:18:31
↑ 67↓ 78
20K· 12.43 mi
8:15/mi
1:44:10
↑ 106↓ 860.1%
Half· 13.11 mi
8:12/mi
1:49:46
↑ 19↓ 370.5%
25K· 15.53 mi
8:21/mi
2:10:01
↑ 66↓ 880.2%
30K· 18.64 mi
8:24/mi
2:36:07
↑ 181↓ 1480.2%
20M
8:23/mi
2:47:30
↑ 64↓ 500.2%
21M
9:01/mi
2:56:31
↑ 106↓ 241.6%
35K· 21.75 mi
8:03/mi
3:02:32
↑ 17↓ 861.7%
23M
8:45/mi
3:13:29
↑ 23↓ 630.6%
24M
8:04/mi
3:21:33
↓ 821.3%
40K· 24.85 mi
7:57/mi
3:28:21
↓ 200.3%
25.2M
8:39/mi
3:31:20
↑ 13↓ 160.2%
Finish· 26.22 mi
7:51/mi
3:39:20
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:49:46
Pace8:22 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:49:34
Pace8:21 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:4426:098:2526:09
8:25
-
10K
6.21 mi11:45:4753:128:3427:03
8:42
+0:17
15K
9.32 mi12:11:061:18:318:2525:19
8:09
-0:33
20K
12.43 mi12:36:451:44:108:2325:39
8:15
+0:06
Half
13.11 mi12:42:211:49:468:225:36
8:12
-0:03
25K
15.53 mi13:02:362:10:018:2220:15
8:21
+0:09
30K
18.64 mi13:28:422:36:078:2226:06
8:24
+0:03
20M
20.00 mi13:40:052:47:308:2211:23
8:23
-0:01
21M
21.00 mi13:49:062:56:318:249:01
9:01
+0:38
35K
21.75 mi13:55:073:02:328:246:01
8:03
-0:58
23M
23.00 mi14:06:043:13:298:2510:57
8:45
+0:42
24M
24.00 mi14:14:083:21:338:248:04
8:04
-0:41
40K
24.85 mi14:20:563:28:218:236:48
7:57
-0:07
25.2M
25.20 mi14:23:553:31:208:232:59
8:39
+0:42
Finish
26.22 mi14:31:553:39:208:228:00
7:51
-0:48

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

7:51 /mi

Average Pace

8:22 /mi

Slowest Pace

9:01 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:49:20

77% of race

Time at Steady Pace

50:00

23% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:22 /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 mi11:18:4426:098:2526:09
8:25
#16988
10K
6.21 mi11:45:4753:128:3427:03
8:42
#18261
15K
9.32 mi12:11:061:18:318:2525:19
8:09
#17344
20K
12.43 mi12:36:451:44:108:2325:39
8:15
#16805
Half
13.11 mi12:42:211:49:468:225:36
8:12
#16780
25K
15.53 mi13:02:362:10:018:2220:15
8:21
#16533
30K
18.64 mi13:28:422:36:078:2226:06
8:24
#15970
20M
20.00 mi13:40:052:47:308:2211:23
8:23
#15702
21M
21.00 mi13:49:062:56:318:249:01
9:01
#15564
35K
21.75 mi13:55:073:02:328:246:01
8:03
#15444
23M
23.00 mi14:06:043:13:298:2510:57
8:45
#15375
24M
24.00 mi14:14:083:21:338:248:04
8:04
#15193
40K
24.85 mi14:20:563:28:218:236:48
7:57
#14990
25.2M
25.20 mi14:23:553:31:208:232:59
8:39
#14913
Finish
26.22 mi14:31:553:39:208:228:00
7:51
#14759
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi16988110431104315479(Top 58%)10493(Top 69%)10493(Top 945%)
10K6.21 mi3.10 mi18261-127311565-52211565-52219458(Top 73%)12078(Top 80%)12078(Top 1088%)
15K9.32 mi3.11 mi17344+91711198+36711198+36715479(Top 58%)10493(Top 69%)10493(Top 945%)
20K12.43 mi3.11 mi16805+53910976+22210976+22215304(Top 57%)10385(Top 68%)10385(Top 936%)
Half13.11 mi0.68 mi16780+2510971+510971+515800(Top 59%)10588(Top 70%)10588(Top 954%)
25K15.53 mi2.42 mi16533+24710856+11510856+11515254(Top 57%)10244(Top 68%)10244(Top 923%)
30K18.64 mi3.11 mi15970+56310596+26010596+26013697(Top 51%)9530(Top 63%)9530(Top 859%)
20M20.00 mi1.36 mi15702+26810473+12310473+12312865(Top 48%)9071(Top 60%)9071(Top 817%)
21M21.00 mi1.00 mi15564+13810390+8310390+8313489(Top 51%)9267(Top 61%)9267(Top 835%)
35K21.75 mi0.75 mi15444+12010326+6410326+6412422(Top 47%)8756(Top 58%)8756(Top 789%)
23M23.00 mi1.25 mi15375+6910276+5010276+5014648(Top 55%)9650(Top 64%)9650(Top 869%)
24M24.00 mi1.00 mi15193+18210200+7610200+7611691(Top 44%)8259(Top 54%)8259(Top 744%)
40K24.85 mi0.85 mi14990+20310102+9810102+989731(Top 37%)7209(Top 48%)7209(Top 649%)
25.2M25.20 mi0.35 mi14913+7710060+4210060+4210457(Top 39%)7555(Top 50%)7555(Top 681%)
Finish26.22 mi1.02 mi14759+1549977+839977+8311039(Top 41%)7815(Top 51%)7815(Top 704%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 58%
×21story building
+97ft-345ft

Overall

15479

Males

10493

M60-64

10493

5K→10K

3.1 - 6.2 mi

Top 73%
×5story building
+79ft-138ft

Overall

19458

Males

12078

M60-64

12078

10K→15K

6.2 - 9.3 mi

Top 58%
×3story building
+67ft-78ft

Overall

15479

Males

10493

M60-64

10493

15K→20K

9.3 - 12.4 mi

Top 57%
×5story building
+106ft-86ft

Overall

15304

Males

10385

M60-64

10385

20K→Half

12.4 - 13.1 mi

Top 59%
×2story building
+19ft-37ft

Overall

15800

Males

10588

M60-64

10588

Half→25K

13.1 - 15.5 mi

Top 57%
×4story building
+66ft-88ft

Overall

15254

Males

10244

M60-64

10244

25K→30K

15.5 - 18.6 mi

Top 51%
×9story building
+181ft-148ft

Overall

13697

Males

9530

M60-64

9530

30K→20M

18.6 - 20.0 mi

Top 48%
×5story building
+64ft-50ft

Overall

12865

Males

9071

M60-64

9071

20M→21M

20.0 - 21.0 mi

Top 51%
×8story building
+106ft-24ft

Overall

13489

Males

9267

M60-64

9267

21M→35K

21.0 - 21.8 mi

Top 47%
×7story building
+17ft-86ft

Overall

12422

Males

8756

M60-64

8756

35K→23M

21.8 - 23.0 mi

Top 55%
×5story building
+23ft-63ft

Overall

14648

Males

9650

M60-64

9650

23M→24M

23.0 - 24.0 mi

Top 44%
×6story building
+12ft-82ft

Overall

11691

Males

8259

M60-64

8259

24M→40K

24.0 - 24.9 mi

Top 37%
×1story
+6ft-20ft

Overall

9731

Males

7209

M60-64

7209

40K→25.2M

24.9 - 25.2 mi

Top 39%
×1story
+13ft-16ft

Overall

10457

Males

7555

M60-64

7555

25.2M→Finish

25.2 - 26.2 mi

Top 41%
×2story building
+22ft-21ft

Overall

11039

Males

7815

M60-64

7815

Passing Analysis

Category:
Athletes Passed
3720
Passed By
1491
Net Change
+2229
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16988
5K → 10K401313-1273#16988#18261
10K → 15K93417+917#18261#17344
15K → 20K56122+539#17344#16805
20K → Half3712+25#16805#16780
Half → 25K27225+247#16780#16533
25K → 30K5685+563#16533#15970
30K → 20M2746+268#15970#15702
20M → 21M15618+138#15702#15564
21M → 35K1266+120#15564#15444
35K → 23M11647+69#15444#15375
23M → 24M1842+182#15375#15193
24M → 40K2052+203#15193#14990
40K → 25.2M781+77#14990#14913
25.2M → Finish16915+154#14913#14759
TOTALS37201491+2229
📊

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