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BOSTON MARATHON 2023

Mark Niebur

Bib: 8318•M

CO

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0:00
0:00
/ mi
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Overall
#0 / 26622
Top 21%
Gender (Male)
#0 / 15176
Top 33%
Age Group (M18-39)
#0 / 5285
Race Day Weather
49°/39°F
light intensity drizzle

Race Timeline and Course Information

Your journey through the course with elevation, pacing, and checkpoint details

⏱️ Race Timeline

Watch your race unfold from start to finish

Start
0:00:00
Race begins
5K· 3.11 mi
21:31
Rank: #5761
Start → 5K
21:31 | 6:56/mi
10K· 6.21 mi
43:07
Rank: #6116 (-355)
5K → 10K
21:36 | 6:57/mi
15K· 9.32 mi
1:05:25
Rank: #6607 (-491)
10K → 15K
22:18 | 7:11/mi
20K· 12.43 mi
1:27:05
Rank: #6393 (+214)
15K → 20K
21:40 | 6:58/mi
Half· 13.11 mi
1:31:49
Rank: #6381 (+12)
20K → Half
4:44 | 6:56/mi
25K· 15.53 mi
1:48:55
Rank: #6287 (+94)
Half → 25K
17:06 | 7:03/mi
30K· 18.64 mi
2:11:14
Rank: #6057 (+230)
25K → 30K
22:19 | 7:11/mi
20M
2:20:59
Rank: #5946 (+111)
30K → 20M
9:45 | 7:10/mi
21M
2:28:42
Rank: #5877 (+69)
20M → 21M
7:43 | 7:43/mi
35K· 21.75 mi
2:33:55
Rank: #5835 (+42)
21M → 35K
5:13 | 6:58/mi
23M
2:42:53
Rank: #5706 (+129)
35K → 23M
8:58 | 7:10/mi
24M
2:49:59
Rank: #5621 (+85)
23M → 24M
7:06 | 7:06/mi
40K· 24.85 mi
2:56:16
Rank: #5593 (+28)
24M → 40K
6:17 | 7:21/mi
25.2M
2:59:03
Rank: #5585 (+8)
40K → 25.2M
2:47 | 8:04/mi
Finish· 26.22 mi
3:06:05
Rank: #5497 (+88)
25.2M → Finish
7:02 | 6:54/mi
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Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via Half
Distance13.11 mi
Time1:31:49
Pace7:00 /mi
2nd Half
Distance13.11 mi
Time1:34:16
Pace7:11 /mi
📊Positive Split: 2.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:46:4321:316:5621:31
6:56
-
10K
6.21 mi11:08:1943:076:5621:36
6:57
+0:01
15K
9.32 mi11:30:371:05:257:0122:18
7:11
+0:14
20K
12.43 mi11:52:171:27:057:0021:40
6:58
-0:13
Half
13.11 mi11:57:011:31:497:004:44
6:56
-0:02
25K
15.53 mi12:14:071:48:557:0117:06
7:03
+0:07
30K
18.64 mi12:36:262:11:147:0222:19
7:11
+0:08
20M
20.00 mi12:46:112:20:597:039:45
7:10
-0:01
21M
21.00 mi12:53:542:28:427:057:43
7:43
+0:33
35K
21.75 mi12:59:072:33:557:055:13
6:58
-0:45
23M
23.00 mi13:08:052:42:537:058:58
7:10
+0:12
24M
24.00 mi13:15:112:49:597:057:06
7:06
-0:04
40K
24.85 mi13:21:282:56:167:066:17
7:21
+0:15
25.2M
25.20 mi13:24:152:59:037:062:47
8:04
+0:43
Finish
26.22 mi13:31:173:06:057:067:02
6:54
-1:10

Checkpoint Splits Visualizations

Explore your race data through different visual perspectives. Scroll to discover each visualization.

📈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

6:54 /mi

Average Pace

7:06 /mi

Slowest Pace

8:04 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Bar length shows time spent in each segment. Colors mark your faster to slower segments, relative to your own pace.

Time at Faster Pace

2:55:35

94% of race

Time at Steady Pace

10:30

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:06 /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

Enhanced split table showing pace trends through mini sparkline visualizations.

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:46:4321:316:5621:31
6:56
#5761
10K
6.21 mi11:08:1943:076:5621:36
6:57
#6116
15K
9.32 mi11:30:371:05:257:0122:18
7:11
#6607
20K
12.43 mi11:52:171:27:057:0021:40
6:58
#6393
Half
13.11 mi11:57:011:31:497:004:44
6:56
#6381
25K
15.53 mi12:14:071:48:557:0117:06
7:03
#6287
30K
18.64 mi12:36:262:11:147:0222:19
7:11
#6057
20M
20.00 mi12:46:112:20:597:039:45
7:10
#5946
21M
21.00 mi12:53:542:28:427:057:43
7:43
#5877
35K
21.75 mi12:59:072:33:557:055:13
6:58
#5835
23M
23.00 mi13:08:052:42:537:058:58
7:10
#5706
24M
24.00 mi13:15:112:49:597:057:06
7:06
#5621
40K
24.85 mi13:21:282:56:167:066:17
7:21
#5593
25.2M
25.20 mi13:24:152:59:037:062:47
8:04
#5585
Finish
26.22 mi13:31:173:06:057:067:02
6:54
#5497
Faster pace
Steady pace
Slower pace

Rankings

Your position at each checkpoint and how you ranked in each segment

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi5761529052907633(Top 29%)6679(Top 44%)6679(Top 126%)
10K6.21 mi3.10 mi6116-3555574-2845574-2846489(Top 24%)5843(Top 39%)5843(Top 111%)
15K9.32 mi3.11 mi6607-4915955-3815955-3817633(Top 29%)6679(Top 44%)6679(Top 126%)
20K12.43 mi3.11 mi6393+2145777+1785777+1785820(Top 22%)5329(Top 35%)5329(Top 101%)
Half13.11 mi0.68 mi6381+125766+115766+116175(Top 23%)5618(Top 37%)5618(Top 106%)
25K15.53 mi2.42 mi6287+945696+705696+705854(Top 22%)5333(Top 35%)5333(Top 101%)
30K18.64 mi3.11 mi6057+2305506+1905506+1905392(Top 20%)4914(Top 32%)4914(Top 93%)
20M20.00 mi1.36 mi5946+1115413+935413+934992(Top 19%)4538(Top 30%)4538(Top 86%)
21M21.00 mi1.00 mi5877+695347+665347+665707(Top 21%)4979(Top 33%)4979(Top 94%)
35K21.75 mi0.75 mi5835+425308+395308+395184(Top 19%)4635(Top 31%)4635(Top 88%)
23M23.00 mi1.25 mi5706+1295194+1145194+1144612(Top 17%)4171(Top 27%)4171(Top 79%)
24M24.00 mi1.00 mi5621+855120+745120+745193(Top 20%)4566(Top 30%)4566(Top 86%)
40K24.85 mi0.85 mi5593+285089+315089+315732(Top 22%)4848(Top 32%)4848(Top 92%)
25.2M25.20 mi0.35 mi5585+85076+135076+136837(Top 26%)5469(Top 36%)5469(Top 103%)
Finish26.22 mi1.02 mi5497+884997+794997+794634(Top 17%)4023(Top 27%)4023(Top 76%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 29%
×21stories
+97ft-345ft

Overall

7633

Males

6679

M18-39

6679

5K→10K

3.1 - 6.2 mi

Top 24%
×5stories
+79ft-138ft

Overall

6489

Males

5843

M18-39

5843

10K→15K

6.2 - 9.3 mi

Top 29%
×3stories
+67ft-78ft

Overall

7633

Males

6679

M18-39

6679

15K→20K

9.3 - 12.4 mi

Top 22%
×5stories
+106ft-86ft

Overall

5820

Males

5329

M18-39

5329

20K→Half

12.4 - 13.1 mi

Top 23%
×2stories
+19ft-37ft

Overall

6175

Males

5618

M18-39

5618

Half→25K

13.1 - 15.5 mi

Top 22%
×4stories
+66ft-88ft

Overall

5854

Males

5333

M18-39

5333

25K→30K

15.5 - 18.6 mi

Top 20%
×9stories
+181ft-148ft

Overall

5392

Males

4914

M18-39

4914

30K→20M

18.6 - 20.0 mi

Top 19%
×5stories
+64ft-50ft

Overall

4992

Males

4538

M18-39

4538

20M→21M

20.0 - 21.0 mi

Top 21%
×8stories
+106ft-24ft

Overall

5707

Males

4979

M18-39

4979

21M→35K

21.0 - 21.8 mi

Top 19%
×7stories
+17ft-86ft

Overall

5184

Males

4635

M18-39

4635

35K→23M

21.8 - 23.0 mi

Top 17%
×5stories
+23ft-63ft

Overall

4612

Males

4171

M18-39

4171

23M→24M

23.0 - 24.0 mi

Top 20%
×6stories
+12ft-82ft

Overall

5193

Males

4566

M18-39

4566

24M→40K

24.0 - 24.9 mi

Top 22%
×1story
+6ft-20ft

Overall

5732

Males

4848

M18-39

4848

40K→25.2M

24.9 - 25.2 mi

Top 26%
×1story
+13ft-16ft

Overall

6837

Males

5469

M18-39

5469

25.2M→Finish

25.2 - 26.2 mi

Top 17%
×2stories
+22ft-21ft

Overall

4634

Males

4023

M18-39

4023

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
1413
Passed By
1149
Net Change
+264
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5761
5K → 10K66421-355#5761#6116
10K → 15K24515-491#6116#6607
15K → 20K23622+214#6607#6393
20K → Half2311+12#6393#6381
Half → 25K12531+94#6381#6287
25K → 30K25222+230#6287#6057
30K → 20M12514+111#6057#5946
20M → 21M8920+69#5946#5877
21M → 35K5513+42#5877#5835
35K → 23M1389+129#5835#5706
23M → 24M9510+85#5706#5621
24M → 40K5426+28#5621#5593
40K → 25.2M2618+8#5593#5585
25.2M → Finish10517+88#5585#5497
TOTALS14131149+264
📊

Passing Analysis Visualizations

Explore your passing analysis through 5 different visualizations. Scroll to discover each one.

Time:
Category:

📈Position Graph

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🎨Heatmap Timeline

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Activity Data

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing