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BOSTON MARATHON 2023

Keith Pfirrman

Bib: 26783•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
8:07/mi
25:13
↑ 97↓ 3451.5%
10K· 6.21 mi
7:55/mi
49:49
↑ 79↓ 1380.4%
15K· 9.32 mi
8:00/mi
1:14:41
↑ 67↓ 78
20K· 12.43 mi
8:05/mi
1:39:49
↑ 106↓ 860.1%
Half· 13.11 mi
8:10/mi
1:45:23
↑ 19↓ 370.5%
25K· 15.53 mi
8:42/mi
2:06:29
↑ 66↓ 880.2%
30K· 18.64 mi
9:29/mi
2:35:58
↑ 181↓ 1480.2%
20M
9:46/mi
2:49:14
↑ 64↓ 500.2%
21M
10:47/mi
3:00:01
↑ 106↓ 241.6%
35K· 21.75 mi
9:39/mi
3:07:14
↑ 17↓ 861.7%
23M
10:54/mi
3:20:53
↑ 23↓ 630.6%
24M
11:54/mi
3:32:47
↓ 821.3%
40K· 24.85 mi
9:54/mi
3:41:15
↓ 200.3%
25.2M
10:29/mi
3:44:52
↑ 13↓ 160.2%
Finish· 26.22 mi
9:44/mi
3:54:47
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:45:23
Pace8:02 /mi
2nd Half
Distance13.11 mi
Time2:09:24
Pace9:52 /mi
📊Positive Split: 22.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:48:4825:138:0725:13
8:07
-
10K
6.21 mi12:13:2449:498:0124:36
7:55
-0:12
15K
9.32 mi12:38:161:14:418:0124:52
8:00
+0:05
20K
12.43 mi13:03:241:39:498:0225:08
8:05
+0:05
Half
13.11 mi13:08:581:45:238:025:34
8:10
+0:05
25K
15.53 mi13:30:042:06:298:0921:06
8:42
+0:32
30K
18.64 mi13:59:332:35:588:2229:29
9:29
+0:47
20M
20.00 mi14:12:492:49:148:2813:16
9:46
+0:17
21M
21.00 mi14:23:363:00:018:3410:47
10:47
+1:01
35K
21.75 mi14:30:493:07:148:377:13
9:39
-1:08
23M
23.00 mi14:44:283:20:538:4413:39
10:54
+1:15
24M
24.00 mi14:56:223:32:478:5211:54
11:54
+1:00
40K
24.85 mi15:04:503:41:158:548:28
9:54
-2:00
25.2M
25.20 mi15:08:273:44:528:553:37
10:29
+0:35
Finish
26.22 mi15:18:223:54:478:589:55
9:44
-0:45

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

7:55 /mi

Average Pace

8:58 /mi

Slowest Pace

11:54 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:06:29

54% of race

Time at Steady Pace

1:08:21

29% of race

Time at Slower Pace

39:57

17% of race

Average Pace: 8:57 /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 mi11:48:4825:138:0725:13
8:07
#14828
10K
6.21 mi12:13:2449:498:0124:36
7:55
#14506
15K
9.32 mi12:38:161:14:418:0124:52
8:00
#14441
20K
12.43 mi13:03:241:39:498:0225:08
8:05
#14341
Half
13.11 mi13:08:581:45:238:025:34
8:10
#14402
25K
15.53 mi13:30:042:06:298:0921:06
8:42
#14929
30K
18.64 mi13:59:332:35:588:2229:29
9:29
#15909
20M
20.00 mi14:12:492:49:148:2813:16
9:46
#16292
21M
21.00 mi14:23:363:00:018:3410:47
10:47
#16639
35K
21.75 mi14:30:493:07:148:377:13
9:39
#16811
23M
23.00 mi14:44:283:20:538:4413:39
10:54
#17373
24M
24.00 mi14:56:223:32:478:5211:54
11:54
#18073
40K
24.85 mi15:04:503:41:158:548:28
9:54
#18157
25.2M
25.20 mi15:08:273:44:528:553:37
10:29
#18187
Finish
26.22 mi15:18:223:54:478:589:55
9:44
#18333
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi14828102791027914417(Top 54%)10075(Top 66%)10075(Top 191%)
10K6.21 mi3.10 mi14506+32210144+13510144+13514121(Top 53%)9984(Top 66%)9984(Top 189%)
15K9.32 mi3.11 mi14441+6510100+4410100+4414417(Top 54%)10075(Top 66%)10075(Top 191%)
20K12.43 mi3.11 mi14341+10010044+5610044+5614153(Top 53%)9947(Top 66%)9947(Top 188%)
Half13.11 mi0.68 mi14402-6110068-2410068-2415487(Top 58%)10504(Top 69%)10504(Top 199%)
25K15.53 mi2.42 mi14929-52710247-17910247-17917386(Top 65%)11148(Top 73%)11148(Top 211%)
30K18.64 mi3.11 mi15909-98010569-32210569-32219390(Top 73%)11958(Top 79%)11958(Top 226%)
20M20.00 mi1.36 mi16292-38310693-12410693-12419733(Top 74%)11990(Top 79%)11990(Top 227%)
21M21.00 mi1.00 mi16639-34710837-14410837-14420320(Top 76%)12197(Top 80%)12197(Top 231%)
35K21.75 mi0.75 mi16811-17210907-7010907-7020271(Top 76%)12145(Top 80%)12145(Top 230%)
23M23.00 mi1.25 mi17373-56211112-20511112-20522144(Top 83%)12979(Top 86%)12979(Top 246%)
24M24.00 mi1.00 mi18073-70011381-26911381-26924387(Top 92%)13992(Top 92%)13992(Top 265%)
40K24.85 mi0.85 mi18157-8411408-2711408-2719681(Top 74%)11775(Top 78%)11775(Top 223%)
25.2M25.20 mi0.35 mi18187-3011417-911417-919028(Top 71%)11484(Top 76%)11484(Top 217%)
Finish26.22 mi1.02 mi18333-14611471-5411471-5420886(Top 78%)12366(Top 81%)12366(Top 234%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 54%
×21story building
+97ft-345ft

Overall

14417

Males

10075

M18-39

10075

5K→10K

3.1 - 6.2 mi

Top 53%
×5story building
+79ft-138ft

Overall

14121

Males

9984

M18-39

9984

10K→15K

6.2 - 9.3 mi

Top 54%
×3story building
+67ft-78ft

Overall

14417

Males

10075

M18-39

10075

15K→20K

9.3 - 12.4 mi

Top 53%
×5story building
+106ft-86ft

Overall

14153

Males

9947

M18-39

9947

20K→Half

12.4 - 13.1 mi

Top 58%
×2story building
+19ft-37ft

Overall

15487

Males

10504

M18-39

10504

Half→25K

13.1 - 15.5 mi

Top 65%
×4story building
+66ft-88ft

Overall

17386

Males

11148

M18-39

11148

25K→30K

15.5 - 18.6 mi

Top 73%
×9story building
+181ft-148ft

Overall

19390

Males

11958

M18-39

11958

30K→20M

18.6 - 20.0 mi

Top 74%
×5story building
+64ft-50ft

Overall

19733

Males

11990

M18-39

11990

20M→21M

20.0 - 21.0 mi

Top 76%
×8story building
+106ft-24ft

Overall

20320

Males

12197

M18-39

12197

21M→35K

21.0 - 21.8 mi

Top 76%
×7story building
+17ft-86ft

Overall

20271

Males

12145

M18-39

12145

35K→23M

21.8 - 23.0 mi

Top 83%
×5story building
+23ft-63ft

Overall

22144

Males

12979

M18-39

12979

23M→24M

23.0 - 24.0 mi

Top 92%
×6story building
+12ft-82ft

Overall

24387

Males

13992

M18-39

13992

24M→40K

24.0 - 24.9 mi

Top 74%
×1story
+6ft-20ft

Overall

19681

Males

11775

M18-39

11775

40K→25.2M

24.9 - 25.2 mi

Top 71%
×1story
+13ft-16ft

Overall

19028

Males

11484

M18-39

11484

25.2M→Finish

25.2 - 26.2 mi

Top 78%
×2story building
+22ft-21ft

Overall

20886

Males

12366

M18-39

12366

Passing Analysis

Category:
Athletes Passed
1123
Passed By
4628
Net Change
-3505
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14828
5K → 10K476154+322#14828#14506
10K → 15K213148+65#14506#14441
15K → 20K228128+100#14441#14341
20K → Half1475-61#14341#14402
Half → 25K47574-527#14402#14929
25K → 30K211001-980#14929#15909
30K → 20M21404-383#15909#16292
20M → 21M21368-347#16292#16639
21M → 35K15187-172#16639#16811
35K → 23M9571-562#16811#17373
23M → 24M5705-700#17373#18073
24M → 40K26110-84#18073#18157
40K → 25.2M1242-30#18157#18187
25.2M → Finish15161-146#18187#18333
TOTALS11234628-3505
📊

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