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BOSTON MARATHON 2023

Stephen Sandberg

Bib: 12232•M

MN

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 29%
Gender (Male)
#0 / 15176
Top 43%
Masters (Masters Men)
#0 / 9891
Top 30%
Division (M45-49)
#0 / 2252
Top 39%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:47
Rank: #11048
Start → 5K
23:47 | 7:39/mi
10K· 6.21 mi
46:11
Rank: #9428 (+1620)
5K → 10K
22:24 | 7:13/mi
15K· 9.32 mi
1:09:31
Rank: #9673 (-245)
10K → 15K
23:20 | 7:31/mi
20K· 12.43 mi
1:32:18
Rank: #9201 (+472)
15K → 20K
22:47 | 7:20/mi
Half· 13.11 mi
1:37:20
Rank: #9205 (-4)
20K → Half
5:02 | 7:23/mi
25K· 15.53 mi
1:55:18
Rank: #8995 (+210)
Half → 25K
17:58 | 7:25/mi
30K· 18.64 mi
2:19:37
Rank: #9078 (-83)
25K → 30K
24:19 | 7:50/mi
20M
2:29:50
Rank: #8881 (+197)
30K → 20M
10:13 | 7:31/mi
21M
2:37:34
Rank: #8664 (+217)
20M → 21M
7:44 | 7:44/mi
35K· 21.75 mi
2:42:57
Rank: #8575 (+89)
21M → 35K
5:23 | 7:12/mi
23M
2:51:50
Rank: #8233 (+342)
35K → 23M
8:53 | 7:06/mi
24M
2:58:46
Rank: #8003 (+230)
23M → 24M
6:56 | 6:56/mi
40K· 24.85 mi
3:05:03
Rank: #7891 (+112)
24M → 40K
6:17 | 7:21/mi
25.2M
3:07:41
Rank: #7835 (+56)
40K → 25.2M
2:38 | 7:38/mi
Finish· 26.22 mi
3:14:34
Rank: #7606 (+229)
25.2M → Finish
6:53 | 6:45/mi

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:37:20
Pace7:25 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:37:14
Pace7:25 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:3523:477:3923:47
7:39
-
10K
6.21 mi11:13:5946:117:2622:24
7:13
-0:26
15K
9.32 mi11:37:191:09:317:2823:20
7:31
+0:18
20K
12.43 mi12:00:061:32:187:2622:47
7:20
-0:11
Half
13.11 mi12:05:081:37:207:255:02
7:23
+0:03
25K
15.53 mi12:23:061:55:187:2517:58
7:25
+0:02
30K
18.64 mi12:47:252:19:377:2924:19
7:50
+0:25
20M
20.00 mi12:57:382:29:507:2910:13
7:31
-0:19
21M
21.00 mi13:05:222:37:347:307:44
7:44
+0:13
35K
21.75 mi13:10:452:42:577:305:23
7:12
-0:32
23M
23.00 mi13:19:382:51:507:288:53
7:06
-0:06
24M
24.00 mi13:26:342:58:467:276:56
6:56
-0:10
40K
24.85 mi13:32:513:05:037:276:17
7:21
+0:25
25.2M
25.20 mi13:35:293:07:417:272:38
7:38
+0:17
Finish
26.22 mi13:42:223:14:347:266:53
6:45
-0:53

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

6:45 /mi

Average Pace

7:26 /mi

Slowest Pace

7:50 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:42:33

53% of race

Time at Steady Pace

1:32:01

47% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:25 /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 mi10:51:3523:477:3923:47
7:39
#11048
10K
6.21 mi11:13:5946:117:2622:24
7:13
#9428
15K
9.32 mi11:37:191:09:317:2823:20
7:31
#9673
20K
12.43 mi12:00:061:32:187:2622:47
7:20
#9201
Half
13.11 mi12:05:081:37:207:255:02
7:23
#9205
25K
15.53 mi12:23:061:55:187:2517:58
7:25
#8995
30K
18.64 mi12:47:252:19:377:2924:19
7:50
#9078
20M
20.00 mi12:57:382:29:507:2910:13
7:31
#8881
21M
21.00 mi13:05:222:37:347:307:44
7:44
#8664
35K
21.75 mi13:10:452:42:577:305:23
7:12
#8575
23M
23.00 mi13:19:382:51:507:288:53
7:06
#8233
24M
24.00 mi13:26:342:58:467:276:56
6:56
#8003
40K
24.85 mi13:32:513:05:037:276:17
7:21
#7891
25.2M
25.20 mi13:35:293:07:417:272:38
7:38
#7835
Finish
26.22 mi13:42:223:14:347:266:53
6:45
#7606
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi110488675867510240(Top 38%)8265(Top 54%)8265(Top 367%)
10K6.21 mi3.10 mi9428+16207832+8437832+8438159(Top 31%)7049(Top 46%)7049(Top 313%)
15K9.32 mi3.11 mi9673-2457964-1327964-13210240(Top 38%)8265(Top 54%)8265(Top 367%)
20K12.43 mi3.11 mi9201+4727674+2907674+2908031(Top 30%)6906(Top 46%)6906(Top 307%)
Half13.11 mi0.68 mi9205-47672+27672+29147(Top 34%)7582(Top 50%)7582(Top 337%)
25K15.53 mi2.42 mi8995+2107540+1327540+1328086(Top 30%)6857(Top 45%)6857(Top 304%)
30K18.64 mi3.11 mi9078-837551-117551-119543(Top 36%)7585(Top 50%)7585(Top 337%)
20M20.00 mi1.36 mi8881+1977413+1387413+1386904(Top 26%)5913(Top 39%)5913(Top 263%)
21M21.00 mi1.00 mi8664+2177255+1587255+1585813(Top 22%)5065(Top 33%)5065(Top 225%)
35K21.75 mi0.75 mi8575+897193+627193+626495(Top 24%)5575(Top 37%)5575(Top 248%)
23M23.00 mi1.25 mi8233+3426950+2436950+2434299(Top 16%)3926(Top 26%)3926(Top 174%)
24M24.00 mi1.00 mi8003+2306787+1636787+1634360(Top 16%)3952(Top 26%)3952(Top 175%)
40K24.85 mi0.85 mi7891+1126699+886699+885756(Top 22%)4872(Top 32%)4872(Top 216%)
25.2M25.20 mi0.35 mi7835+566657+426657+424595(Top 17%)4008(Top 26%)4008(Top 178%)
Finish26.22 mi1.02 mi7606+2296487+1706487+1703833(Top 14%)3405(Top 22%)3405(Top 151%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 38%
×21stories
+97ft-345ft

Overall

10240

Males

8265

M45-49

8265

5K→10K

3.1 - 6.2 mi

Top 31%
×5stories
+79ft-138ft

Overall

8159

Males

7049

M45-49

7049

10K→15K

6.2 - 9.3 mi

Top 38%
×3stories
+67ft-78ft

Overall

10240

Males

8265

M45-49

8265

15K→20K

9.3 - 12.4 mi

Top 30%
×5stories
+106ft-86ft

Overall

8031

Males

6906

M45-49

6906

20K→Half

12.4 - 13.1 mi

Top 34%
×2stories
+19ft-37ft

Overall

9147

Males

7582

M45-49

7582

Half→25K

13.1 - 15.5 mi

Top 30%
×4stories
+66ft-88ft

Overall

8086

Males

6857

M45-49

6857

25K→30K

15.5 - 18.6 mi

Top 36%
×9stories
+181ft-148ft

Overall

9543

Males

7585

M45-49

7585

30K→20M

18.6 - 20.0 mi

Top 26%
×5stories
+64ft-50ft

Overall

6904

Males

5913

M45-49

5913

20M→21M

20.0 - 21.0 mi

Top 22%
×8stories
+106ft-24ft

Overall

5813

Males

5065

M45-49

5065

21M→35K

21.0 - 21.8 mi

Top 24%
×7stories
+17ft-86ft

Overall

6495

Males

5575

M45-49

5575

35K→23M

21.8 - 23.0 mi

Top 16%
×5stories
+23ft-63ft

Overall

4299

Males

3926

M45-49

3926

23M→24M

23.0 - 24.0 mi

Top 16%
×6stories
+12ft-82ft

Overall

4360

Males

3952

M45-49

3952

24M→40K

24.0 - 24.9 mi

Top 22%
×1story
+6ft-20ft

Overall

5756

Males

4872

M45-49

4872

40K→25.2M

24.9 - 25.2 mi

Top 17%
×1story
+13ft-16ft

Overall

4595

Males

4008

M45-49

4008

25.2M→Finish

25.2 - 26.2 mi

Top 14%
×2stories
+22ft-21ft

Overall

3833

Males

3405

M45-49

3405

Passing Analysis

Category:
Athletes Passed
4101*
Passed By
659
Net Change
+3442
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11048
5K → 10K1632*12+1620#11048#9428
10K → 15K86331-245#9428#9673
15K → 20K4808+472#9673#9201
20K → Half2226-4#9201#9205
Half → 25K23121+210#9205#8995
25K → 30K139222-83#8995#9078
30K → 20M20710+197#9078#8881
20M → 21M2225+217#8881#8664
21M → 35K989+89#8664#8575
35K → 23M3431+342#8575#8233
23M → 24M2300+230#8233#8003
24M → 40K12311+112#8003#7891
40K → 25.2M571+56#7891#7835
25.2M → Finish2312+229#7835#7606
TOTALS4101*659+3442

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

Passing Visuals

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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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing