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BOSTON MARATHON 2023

Walker Shiflet

Bib: 27311•M

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 47%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M40-44)
#0 / 2241
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
8:17/mi
25:44
↑ 97↓ 3451.5%
10K· 6.21 mi
8:00/mi
50:34
↑ 79↓ 1380.4%
15K· 9.32 mi
7:54/mi
1:15:07
↑ 67↓ 78
20K· 12.43 mi
8:01/mi
1:40:00
↑ 106↓ 860.1%
Half· 13.11 mi
7:42/mi
1:45:15
↑ 19↓ 370.5%
25K· 15.53 mi
8:03/mi
2:04:45
↑ 66↓ 880.2%
30K· 18.64 mi
8:14/mi
2:30:21
↑ 181↓ 1480.2%
20M
8:13/mi
2:41:31
↑ 64↓ 500.2%
21M
8:29/mi
2:50:00
↑ 106↓ 241.6%
35K· 21.75 mi
7:40/mi
2:55:44
↑ 17↓ 861.7%
23M
8:00/mi
3:05:45
↑ 23↓ 630.6%
24M
7:38/mi
3:13:23
↓ 821.3%
40K· 24.85 mi
7:58/mi
3:20:12
↓ 200.3%
25.2M
8:51/mi
3:23:15
↑ 13↓ 160.2%
Finish· 26.22 mi
7:29/mi
3:30:53
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:45:15
Pace8:02 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:45:38
Pace8:03 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:43:3625:448:1725:44
8:17
-
10K
6.21 mi12:08:2650:348:0824:50
8:00
-0:17
15K
9.32 mi12:32:591:15:078:0424:33
7:54
-0:06
20K
12.43 mi12:57:521:40:008:0324:53
8:01
+0:07
Half
13.11 mi13:03:071:45:158:025:15
7:42
-0:19
25K
15.53 mi13:22:372:04:458:0219:30
8:03
+0:21
30K
18.64 mi13:48:132:30:218:0425:36
8:14
+0:11
20M
20.00 mi13:59:232:41:318:0511:10
8:13
-0:01
21M
21.00 mi14:07:522:50:008:068:29
8:29
+0:16
35K
21.75 mi14:13:362:55:448:055:44
7:40
-0:49
23M
23.00 mi14:23:373:05:458:0510:01
8:00
+0:20
24M
24.00 mi14:31:153:13:238:037:38
7:38
-0:22
40K
24.85 mi14:38:043:20:128:036:49
7:58
+0:20
25.2M
25.20 mi14:41:073:23:158:043:03
8:51
+0:53
Finish
26.22 mi14:48:453:30:538:037:38
7:29
-1:22

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

7:29 /mi

Average Pace

8:03 /mi

Slowest Pace

8:51 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:28:01

70% of race

Time at Steady Pace

59:49

28% of race

Time at Slower Pace

3:03

1% of race

Average Pace: 8:03 /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 mi11:43:3625:448:1725:44
8:17
#16012
10K
6.21 mi12:08:2650:348:0824:50
8:00
#15364
15K
9.32 mi12:32:591:15:078:0424:33
7:54
#14810
20K
12.43 mi12:57:521:40:008:0324:53
8:01
#14435
Half
13.11 mi13:03:071:45:158:025:15
7:42
#14316
25K
15.53 mi13:22:372:04:458:0219:30
8:03
#14100
30K
18.64 mi13:48:132:30:218:0425:36
8:14
#13812
20M
20.00 mi13:59:232:41:318:0511:10
8:13
#13632
21M
21.00 mi14:07:522:50:008:068:29
8:29
#13410
35K
21.75 mi14:13:362:55:448:055:44
7:40
#13253
23M
23.00 mi14:23:373:05:458:0510:01
8:00
#13008
24M
24.00 mi14:31:153:13:238:037:38
7:38
#12820
40K
24.85 mi14:38:043:20:128:036:49
7:58
#12698
25.2M
25.20 mi14:41:073:23:158:043:03
8:51
#12681
Finish
26.22 mi14:48:453:30:538:037:38
7:29
#12494
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi16012106991069913533(Top 51%)9717(Top 64%)9717(Top 434%)
10K6.21 mi3.10 mi15364+64810461+23810461+23814745(Top 55%)10218(Top 67%)10218(Top 456%)
15K9.32 mi3.11 mi14810+55410245+21610245+21613533(Top 51%)9717(Top 64%)9717(Top 434%)
20K12.43 mi3.11 mi14435+37510083+16210083+16213496(Top 51%)9660(Top 64%)9660(Top 431%)
Half13.11 mi0.68 mi14316+11910028+5510028+5511815(Top 44%)9000(Top 59%)9000(Top 402%)
25K15.53 mi2.42 mi14100+2169909+1199909+11913073(Top 49%)9385(Top 62%)9385(Top 419%)
30K18.64 mi3.11 mi13812+2889772+1379772+13712599(Top 47%)9062(Top 60%)9062(Top 404%)
20M20.00 mi1.36 mi13632+1809678+949678+9411802(Top 44%)8629(Top 57%)8629(Top 385%)
21M21.00 mi1.00 mi13410+2229569+1099569+10910390(Top 39%)7810(Top 51%)7810(Top 349%)
35K21.75 mi0.75 mi13253+1579491+789491+789712(Top 36%)7484(Top 49%)7484(Top 334%)
23M23.00 mi1.25 mi13008+2459358+1339358+1339734(Top 37%)7357(Top 48%)7357(Top 328%)
24M24.00 mi1.00 mi12820+1889258+1009258+1008635(Top 32%)6702(Top 44%)6702(Top 299%)
40K24.85 mi0.85 mi12698+1229191+679191+679865(Top 37%)7281(Top 48%)7281(Top 325%)
25.2M25.20 mi0.35 mi12681+179175+169175+1611541(Top 43%)8055(Top 53%)8055(Top 359%)
Finish26.22 mi1.02 mi12494+1879076+999076+998490(Top 32%)6466(Top 43%)6466(Top 289%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 51%
×21story building
+97ft-345ft

Overall

13533

Males

9717

M40-44

9717

5K→10K

3.1 - 6.2 mi

Top 55%
×5story building
+79ft-138ft

Overall

14745

Males

10218

M40-44

10218

10K→15K

6.2 - 9.3 mi

Top 51%
×3story building
+67ft-78ft

Overall

13533

Males

9717

M40-44

9717

15K→20K

9.3 - 12.4 mi

Top 51%
×5story building
+106ft-86ft

Overall

13496

Males

9660

M40-44

9660

20K→Half

12.4 - 13.1 mi

Top 44%
×2story building
+19ft-37ft

Overall

11815

Males

9000

M40-44

9000

Half→25K

13.1 - 15.5 mi

Top 49%
×4story building
+66ft-88ft

Overall

13073

Males

9385

M40-44

9385

25K→30K

15.5 - 18.6 mi

Top 47%
×9story building
+181ft-148ft

Overall

12599

Males

9062

M40-44

9062

30K→20M

18.6 - 20.0 mi

Top 44%
×5story building
+64ft-50ft

Overall

11802

Males

8629

M40-44

8629

20M→21M

20.0 - 21.0 mi

Top 39%
×8story building
+106ft-24ft

Overall

10390

Males

7810

M40-44

7810

21M→35K

21.0 - 21.8 mi

Top 36%
×7story building
+17ft-86ft

Overall

9712

Males

7484

M40-44

7484

35K→23M

21.8 - 23.0 mi

Top 37%
×5story building
+23ft-63ft

Overall

9734

Males

7357

M40-44

7357

23M→24M

23.0 - 24.0 mi

Top 32%
×6story building
+12ft-82ft

Overall

8635

Males

6702

M40-44

6702

24M→40K

24.0 - 24.9 mi

Top 37%
×1story
+6ft-20ft

Overall

9865

Males

7281

M40-44

7281

40K→25.2M

24.9 - 25.2 mi

Top 43%
×1story
+13ft-16ft

Overall

11541

Males

8055

M40-44

8055

25.2M→Finish

25.2 - 26.2 mi

Top 32%
×2story building
+22ft-21ft

Overall

8490

Males

6466

M40-44

6466

Passing Analysis

Category:
Athletes Passed
3871
Passed By
353
Net Change
+3518
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16012
5K → 10K74395+648#16012#15364
10K → 15K58026+554#15364#14810
15K → 20K41338+375#14810#14435
20K → Half1223+119#14435#14316
Half → 25K25943+216#14316#14100
25K → 30K35264+288#14100#13812
30K → 20M20121+180#13812#13632
20M → 21M23311+222#13632#13410
21M → 35K1603+157#13410#13253
35K → 23M2538+245#13253#13008
23M → 24M1968+188#13008#12820
24M → 40K1319+122#12820#12698
40K → 25.2M3215+17#12698#12681
25.2M → Finish1969+187#12681#12494
TOTALS3871353+3518
📊

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