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BOSTON MARATHON 2023

Christopher Grundberg

Bib: 6939•M

NY

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 27%
Gender (Male)
#0 / 15176
Top 40%
Masters (Masters Men)
#0 / 9891
Top 27%
Division (M40-44)
#0 / 2241
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:32
Rank: #5805
Start → 5K
21:32 | 6:56/mi
10K· 6.21 mi
43:19
Rank: #6338 (-533)
5K → 10K
21:47 | 7:01/mi
15K· 9.32 mi
1:05:22
Rank: #6582 (-244)
10K → 15K
22:03 | 7:06/mi
20K· 12.43 mi
1:27:34
Rank: #6616 (-34)
15K → 20K
22:12 | 7:09/mi
Half· 13.11 mi
1:32:29
Rank: #6670 (-54)
20K → Half
4:55 | 7:12/mi
25K· 15.53 mi
1:50:02
Rank: #6686 (-16)
Half → 25K
17:33 | 7:14/mi
30K· 18.64 mi
2:13:37
Rank: #6792 (-106)
25K → 30K
23:35 | 7:35/mi
20M
2:24:04
Rank: #6862 (-70)
30K → 20M
10:27 | 7:41/mi
21M
2:32:10
Rank: #6859 (+3)
20M → 21M
8:06 | 8:06/mi
35K· 21.75 mi
2:37:52
Rank: #6894 (-35)
21M → 35K
5:42 | 7:37/mi
23M
2:47:31
Rank: #6894
35K → 23M
9:39 | 7:42/mi
24M
2:55:05
Rank: #6908 (-14)
23M → 24M
7:34 | 7:34/mi
40K· 24.85 mi
3:01:46
Rank: #6946 (-38)
24M → 40K
6:41 | 7:49/mi
25.2M
3:04:38
Rank: #6937 (+9)
40K → 25.2M
2:52 | 8:19/mi
Finish· 26.22 mi
3:12:42
Rank: #7062 (-125)
25.2M → Finish
8:04 | 7:55/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:32:29
Pace7:03 /mi
2nd Half
Distance13.11 mi
Time1:40:13
Pace7:39 /mi
📊Positive Split: 8.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:25:1921:326:5621:32
6:56
-
10K
6.21 mi10:47:0643:196:5821:47
7:01
+0:05
15K
9.32 mi11:09:091:05:227:0122:03
7:06
+0:05
20K
12.43 mi11:31:211:27:347:0322:12
7:09
+0:03
Half
13.11 mi11:36:161:32:297:034:55
7:12
+0:03
25K
15.53 mi11:53:491:50:027:0517:33
7:14
+0:02
30K
18.64 mi12:17:242:13:377:1023:35
7:35
+0:21
20M
20.00 mi12:27:512:24:047:1210:27
7:41
+0:06
21M
21.00 mi12:35:572:32:107:158:06
8:06
+0:25
35K
21.75 mi12:41:392:37:527:165:42
7:37
-0:29
23M
23.00 mi12:51:182:47:317:179:39
7:42
+0:05
24M
24.00 mi12:58:522:55:057:187:34
7:34
-0:08
40K
24.85 mi13:05:333:01:467:196:41
7:49
+0:15
25.2M
25.20 mi13:08:253:04:387:202:52
8:19
+0:30
Finish
26.22 mi13:16:293:12:427:218:04
7:55
-0:24

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

6:56 /mi

Average Pace

7:21 /mi

Slowest Pace

8:19 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:26:53

76% of race

Time at Steady Pace

42:57

22% of race

Time at Slower Pace

2:52

1% of race

Average Pace: 7:21 /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 mi10:25:1921:326:5621:32
6:56
#5805
10K
6.21 mi10:47:0643:196:5821:47
7:01
#6338
15K
9.32 mi11:09:091:05:227:0122:03
7:06
#6582
20K
12.43 mi11:31:211:27:347:0322:12
7:09
#6616
Half
13.11 mi11:36:161:32:297:034:55
7:12
#6670
25K
15.53 mi11:53:491:50:027:0517:33
7:14
#6686
30K
18.64 mi12:17:242:13:377:1023:35
7:35
#6792
20M
20.00 mi12:27:512:24:047:1210:27
7:41
#6862
21M
21.00 mi12:35:572:32:107:158:06
8:06
#6859
35K
21.75 mi12:41:392:37:527:165:42
7:37
#6894
23M
23.00 mi12:51:182:47:317:179:39
7:42
#6894
24M
24.00 mi12:58:522:55:057:187:34
7:34
#6908
40K
24.85 mi13:05:333:01:467:196:41
7:49
#6946
25.2M
25.20 mi13:08:253:04:387:202:52
8:19
#6937
Finish
26.22 mi13:16:293:12:427:218:04
7:55
#7062
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi5805532953297136(Top 27%)6342(Top 42%)6342(Top 283%)
10K6.21 mi3.10 mi6338-5335747-4185747-4186903(Top 26%)6164(Top 41%)6164(Top 275%)
15K9.32 mi3.11 mi6582-2445939-1925939-1927136(Top 27%)6342(Top 42%)6342(Top 283%)
20K12.43 mi3.11 mi6616-345945-65945-66784(Top 25%)6051(Top 40%)6051(Top 270%)
Half13.11 mi0.68 mi6670-545991-465991-467847(Top 29%)6795(Top 45%)6795(Top 303%)
25K15.53 mi2.42 mi6686-165996-55996-56888(Top 26%)6081(Top 40%)6081(Top 271%)
30K18.64 mi3.11 mi6792-1066059-636059-637868(Top 30%)6603(Top 44%)6603(Top 295%)
20M20.00 mi1.36 mi6862-706098-396098-398074(Top 30%)6634(Top 44%)6634(Top 296%)
21M21.00 mi1.00 mi6859+36093+56093+57979(Top 30%)6456(Top 43%)6456(Top 288%)
35K21.75 mi0.75 mi6894-356104-116104-119351(Top 35%)7256(Top 48%)7256(Top 324%)
23M23.00 mi1.25 mi68946082+226082+227740(Top 29%)6265(Top 41%)6265(Top 280%)
24M24.00 mi1.00 mi6908-146069+136069+138129(Top 31%)6385(Top 42%)6385(Top 285%)
40K24.85 mi0.85 mi6946-386078-96078-98753(Top 33%)6677(Top 44%)6677(Top 298%)
25.2M25.20 mi0.35 mi6937+96058+206058+208304(Top 31%)6336(Top 42%)6336(Top 283%)
Finish26.22 mi1.02 mi7062-1256121-636121-6311468(Top 43%)8016(Top 53%)8016(Top 358%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 27%
×21stories
+97ft-345ft

Overall

7136

Males

6342

M40-44

6342

5K→10K

3.1 - 6.2 mi

Top 26%
×5stories
+79ft-138ft

Overall

6903

Males

6164

M40-44

6164

10K→15K

6.2 - 9.3 mi

Top 27%
×3stories
+67ft-78ft

Overall

7136

Males

6342

M40-44

6342

15K→20K

9.3 - 12.4 mi

Top 25%
×5stories
+106ft-86ft

Overall

6784

Males

6051

M40-44

6051

20K→Half

12.4 - 13.1 mi

Top 29%
×2stories
+19ft-37ft

Overall

7847

Males

6795

M40-44

6795

Half→25K

13.1 - 15.5 mi

Top 26%
×4stories
+66ft-88ft

Overall

6888

Males

6081

M40-44

6081

25K→30K

15.5 - 18.6 mi

Top 30%
×9stories
+181ft-148ft

Overall

7868

Males

6603

M40-44

6603

30K→20M

18.6 - 20.0 mi

Top 30%
×5stories
+64ft-50ft

Overall

8074

Males

6634

M40-44

6634

20M→21M

20.0 - 21.0 mi

Top 30%
×8stories
+106ft-24ft

Overall

7979

Males

6456

M40-44

6456

21M→35K

21.0 - 21.8 mi

Top 35%
×7stories
+17ft-86ft

Overall

9351

Males

7256

M40-44

7256

35K→23M

21.8 - 23.0 mi

Top 29%
×5stories
+23ft-63ft

Overall

7740

Males

6265

M40-44

6265

23M→24M

23.0 - 24.0 mi

Top 31%
×6stories
+12ft-82ft

Overall

8129

Males

6385

M40-44

6385

24M→40K

24.0 - 24.9 mi

Top 33%
×1story
+6ft-20ft

Overall

8753

Males

6677

M40-44

6677

40K→25.2M

24.9 - 25.2 mi

Top 31%
×1story
+13ft-16ft

Overall

8304

Males

6336

M40-44

6336

25.2M→Finish

25.2 - 26.2 mi

Top 43%
×2stories
+22ft-21ft

Overall

11468

Males

8016

M40-44

8016

Passing Analysis

Category:
Athletes Passed
705
Passed By
1962
Net Change
-1257
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5805
5K → 10K39572-533#5805#6338
10K → 15K50294-244#6338#6582
15K → 20K103137-34#6582#6616
20K → Half155-54#6616#6670
Half → 25K7995-16#6670#6686
25K → 30K80186-106#6686#6792
30K → 20M36106-70#6792#6862
20M → 21M6562+3#6862#6859
21M → 35K2863-35#6859#6894
35K → 23M69690#6894#6894
23M → 24M5064-14#6894#6908
24M → 40K4381-38#6908#6946
40K → 25.2M3728+9#6946#6937
25.2M → Finish25150-125#6937#7062
TOTALS7051962-1257
📊

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