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BOSTON MARATHON 2023

Zach Njoroge

Bib: 2885•M

TX

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 4%
Gender (Male)
#0 / 15176
Top 7%
Division (M18-39)
#0 / 5285
Top 16%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:36
Rank: #1461
Start → 5K
19:36 | 6:19/mi
10K· 6.21 mi
38:42
Rank: #1286 (+175)
5K → 10K
19:06 | 6:09/mi
15K· 9.32 mi
57:54
Rank: #1231 (+55)
10K → 15K
19:12 | 6:11/mi
20K· 12.43 mi
1:17:12
Rank: #1191 (+40)
15K → 20K
19:18 | 6:13/mi
Half· 13.11 mi
1:21:25
Rank: #1186 (+5)
20K → Half
4:13 | 6:11/mi
25K· 15.53 mi
1:36:30
Rank: #1161 (+25)
Half → 25K
15:05 | 6:13/mi
30K· 18.64 mi
1:56:22
Rank: #1149 (+12)
25K → 30K
19:52 | 6:24/mi
20M
2:05:05
Rank: #1133 (+16)
30K → 20M
8:43 | 6:25/mi
21M
2:11:56
Rank: #1132 (+1)
20M → 21M
6:51 | 6:51/mi
35K· 21.75 mi
2:16:33
Rank: #1113 (+19)
21M → 35K
4:37 | 6:10/mi
23M
2:24:33
Rank: #1102 (+11)
35K → 23M
8:00 | 6:23/mi
24M
2:30:47
Rank: #1097 (+5)
23M → 24M
6:14 | 6:14/mi
40K· 24.85 mi
2:36:15
Rank: #1083 (+14)
24M → 40K
5:28 | 6:24/mi
25.2M
2:38:40
Rank: #1089 (-6)
40K → 25.2M
2:25 | 7:00/mi
Finish· 26.22 mi
2:45:04
Rank: #1089
25.2M → Finish
6:24 | 6:17/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:21:25
Pace6:13 /mi
2nd Half
Distance13.11 mi
Time1:23:39
Pace6:23 /mi
📊Positive Split: 2.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:20:2519:366:1919:36
6:19
-
10K
6.21 mi10:39:3138:426:1419:06
6:09
-0:10
15K
9.32 mi10:58:4357:546:1319:12
6:11
+0:02
20K
12.43 mi11:18:011:17:126:1319:18
6:13
+0:02
Half
13.11 mi11:22:141:21:256:134:13
6:11
-0:02
25K
15.53 mi11:37:191:36:306:1315:05
6:13
+0:02
30K
18.64 mi11:57:111:56:226:1519:52
6:24
+0:11
20M
20.00 mi12:05:542:05:056:158:43
6:25
+0:01
21M
21.00 mi12:12:452:11:566:176:51
6:51
+0:26
35K
21.75 mi12:17:222:16:336:174:37
6:10
-0:41
23M
23.00 mi12:25:222:24:336:178:00
6:23
+0:13
24M
24.00 mi12:31:362:30:476:176:14
6:14
-0:09
40K
24.85 mi12:37:042:36:156:175:28
6:24
+0:10
25.2M
25.20 mi12:39:292:38:406:182:25
7:00
+0:36
Finish
26.22 mi12:45:532:45:046:186:24
6:17
-0:43

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

6:09 /mi

Average Pace

6:18 /mi

Slowest Pace

7:00 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:35:48

94% of race

Time at Steady Pace

9:16

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:18 /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 mi10:20:2519:366:1919:36
6:19
#1461
10K
6.21 mi10:39:3138:426:1419:06
6:09
#1286
15K
9.32 mi10:58:4357:546:1319:12
6:11
#1231
20K
12.43 mi11:18:011:17:126:1319:18
6:13
#1191
Half
13.11 mi11:22:141:21:256:134:13
6:11
#1186
25K
15.53 mi11:37:191:36:306:1315:05
6:13
#1161
30K
18.64 mi11:57:111:56:226:1519:52
6:24
#1149
20M
20.00 mi12:05:542:05:056:158:43
6:25
#1133
21M
21.00 mi12:12:452:11:566:176:51
6:51
#1132
35K
21.75 mi12:17:222:16:336:174:37
6:10
#1113
23M
23.00 mi12:25:222:24:336:178:00
6:23
#1102
24M
24.00 mi12:31:362:30:476:176:14
6:14
#1097
40K
24.85 mi12:37:042:36:156:175:28
6:24
#1083
25.2M
25.20 mi12:39:292:38:406:182:25
7:00
#1089
Finish
26.22 mi12:45:532:45:046:186:24
6:17
#1089
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi1461139013901179(Top 4%)1125(Top 7%)1125(Top 21%)
10K6.21 mi3.10 mi1286+1751221+1691221+1691165(Top 4%)1105(Top 7%)1105(Top 21%)
15K9.32 mi3.11 mi1231+551168+531168+531179(Top 4%)1125(Top 7%)1125(Top 21%)
20K12.43 mi3.11 mi1191+401134+341134+341078(Top 4%)1027(Top 7%)1027(Top 19%)
Half13.11 mi0.68 mi1186+51129+51129+51266(Top 5%)1214(Top 8%)1214(Top 23%)
25K15.53 mi2.42 mi1161+251106+231106+231053(Top 4%)1003(Top 7%)1003(Top 19%)
30K18.64 mi3.11 mi1149+121096+101096+101192(Top 4%)1136(Top 7%)1136(Top 21%)
20M20.00 mi1.36 mi1133+161080+161080+161174(Top 4%)1118(Top 7%)1118(Top 21%)
21M21.00 mi1.00 mi1132+11079+11079+11560(Top 6%)1484(Top 10%)1484(Top 28%)
35K21.75 mi0.75 mi1113+191060+191060+191150(Top 4%)1094(Top 7%)1094(Top 21%)
23M23.00 mi1.25 mi1102+111050+101050+101066(Top 4%)1011(Top 7%)1011(Top 19%)
24M24.00 mi1.00 mi1097+51045+51045+51115(Top 4%)1056(Top 7%)1056(Top 20%)
40K24.85 mi0.85 mi1083+141031+141031+141177(Top 4%)1112(Top 7%)1112(Top 21%)
25.2M25.20 mi0.35 mi1089-61037-61037-61722(Top 6%)1615(Top 11%)1615(Top 31%)
Finish26.22 mi1.02 mi1089103710371528(Top 6%)1443(Top 10%)1443(Top 27%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 4%
×21stories
+97ft-345ft

Overall

1179

Males

1125

M18-39

1125

5K→10K

3.1 - 6.2 mi

Top 4%
×5stories
+79ft-138ft

Overall

1165

Males

1105

M18-39

1105

10K→15K

6.2 - 9.3 mi

Top 4%
×3stories
+67ft-78ft

Overall

1179

Males

1125

M18-39

1125

15K→20K

9.3 - 12.4 mi

Top 4%
×5stories
+106ft-86ft

Overall

1078

Males

1027

M18-39

1027

20K→Half

12.4 - 13.1 mi

Top 5%
×2stories
+19ft-37ft

Overall

1266

Males

1214

M18-39

1214

Half→25K

13.1 - 15.5 mi

Top 4%
×4stories
+66ft-88ft

Overall

1053

Males

1003

M18-39

1003

25K→30K

15.5 - 18.6 mi

Top 4%
×9stories
+181ft-148ft

Overall

1192

Males

1136

M18-39

1136

30K→20M

18.6 - 20.0 mi

Top 4%
×5stories
+64ft-50ft

Overall

1174

Males

1118

M18-39

1118

20M→21M

20.0 - 21.0 mi

Top 6%
×8stories
+106ft-24ft

Overall

1560

Males

1484

M18-39

1484

21M→35K

21.0 - 21.8 mi

Top 4%
×7stories
+17ft-86ft

Overall

1150

Males

1094

M18-39

1094

35K→23M

21.8 - 23.0 mi

Top 4%
×5stories
+23ft-63ft

Overall

1066

Males

1011

M18-39

1011

23M→24M

23.0 - 24.0 mi

Top 4%
×6stories
+12ft-82ft

Overall

1115

Males

1056

M18-39

1056

24M→40K

24.0 - 24.9 mi

Top 4%
×1story
+6ft-20ft

Overall

1177

Males

1112

M18-39

1112

40K→25.2M

24.9 - 25.2 mi

Top 6%
×1story
+13ft-16ft

Overall

1722

Males

1615

M18-39

1615

25.2M→Finish

25.2 - 26.2 mi

Top 6%
×2stories
+22ft-21ft

Overall

1528

Males

1443

M18-39

1443

Passing Analysis

Category:
Athletes Passed
557
Passed By
185
Net Change
+372
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1461
5K → 10K18813+175#1461#1286
10K → 15K7116+55#1286#1231
15K → 20K5313+40#1231#1191
20K → Half61+5#1191#1186
Half → 25K3914+25#1186#1161
25K → 30K4432+12#1161#1149
30K → 20M2812+16#1149#1133
20M → 21M2322+1#1133#1132
21M → 35K201+19#1132#1113
35K → 23M2615+11#1113#1102
23M → 24M149+5#1102#1097
24M → 40K239+14#1097#1083
40K → 25.2M511-6#1083#1089
25.2M → Finish17170#1089#1089
TOTALS557185+372
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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