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BOSTON MARATHON 2023

David Rolefson

Bib: 12568•M

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 43%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Top 47%
Division (M45-49)
#0 / 2252
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
7:25/mi
23:03
↑ 97↓ 3451.5%
10K· 6.21 mi
7:34/mi
46:34
↑ 79↓ 1380.4%
15K· 9.32 mi
7:33/mi
1:10:00
↑ 67↓ 78
20K· 12.43 mi
7:41/mi
1:33:53
↑ 106↓ 860.1%
Half· 13.11 mi
7:37/mi
1:39:05
↑ 19↓ 370.5%
25K· 15.53 mi
8:02/mi
1:58:33
↑ 66↓ 880.2%
30K· 18.64 mi
8:11/mi
2:23:59
↑ 181↓ 1480.2%
20M
8:17/mi
2:35:14
↑ 64↓ 500.2%
21M
8:49/mi
2:44:03
↑ 106↓ 241.6%
35K· 21.75 mi
8:05/mi
2:50:06
↑ 17↓ 861.7%
23M
8:16/mi
3:00:27
↑ 23↓ 630.6%
24M
8:15/mi
3:08:42
↓ 821.3%
40K· 24.85 mi
8:35/mi
3:16:02
↓ 200.3%
25.2M
8:51/mi
3:19:05
↑ 13↓ 160.2%
Finish· 26.22 mi
7:59/mi
3:27:13
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:39:05
Pace7:33 /mi
2nd Half
Distance13.11 mi
Time1:48:08
Pace8:15 /mi
📊Positive Split: 9.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:50:1723:037:2523:03
7:25
-
10K
6.21 mi11:13:4846:347:3023:31
7:34
+0:09
15K
9.32 mi11:37:141:10:007:3123:26
7:33
-0:01
20K
12.43 mi12:01:071:33:537:3323:53
7:41
+0:08
Half
13.11 mi12:06:191:39:057:335:12
7:37
-0:04
25K
15.53 mi12:25:471:58:337:3819:28
8:02
+0:25
30K
18.64 mi12:51:132:23:597:4325:26
8:11
+0:09
20M
20.00 mi13:02:282:35:147:4611:15
8:17
+0:06
21M
21.00 mi13:11:172:44:037:498:49
8:49
+0:32
35K
21.75 mi13:17:202:50:067:496:03
8:05
-0:44
23M
23.00 mi13:27:413:00:277:5110:21
8:16
+0:11
24M
24.00 mi13:35:563:08:427:528:15
8:15
-0:01
40K
24.85 mi13:43:163:16:027:537:20
8:35
+0:20
25.2M
25.20 mi13:46:193:19:057:543:03
8:51
+0:16
Finish
26.22 mi13:54:273:27:137:558:08
7:59
-0:52

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

7:25 /mi

Average Pace

7:55 /mi

Slowest Pace

8:51 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:12:44

64% of race

Time at Steady Pace

1:02:37

30% of race

Time at Slower Pace

11:52

6% of race

Average Pace: 7:54 /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 mi10:50:1723:037:2523:03
7:25
#8978
10K
6.21 mi11:13:4846:347:3023:31
7:34
#9971
15K
9.32 mi11:37:141:10:007:3123:26
7:33
#10155
20K
12.43 mi12:01:071:33:537:3323:53
7:41
#10303
Half
13.11 mi12:06:191:39:057:335:12
7:37
#10351
25K
15.53 mi12:25:471:58:337:3819:28
8:02
#10742
30K
18.64 mi12:51:132:23:597:4325:26
8:11
#10954
20M
20.00 mi13:02:282:35:147:4611:15
8:17
#11033
21M
21.00 mi13:11:172:44:037:498:49
8:49
#11096
35K
21.75 mi13:17:202:50:067:496:03
8:05
#11154
23M
23.00 mi13:27:413:00:277:5110:21
8:16
#11168
24M
24.00 mi13:35:563:08:427:528:15
8:15
#11266
40K
24.85 mi13:43:163:16:027:537:20
8:35
#11366
25.2M
25.20 mi13:46:193:19:057:543:03
8:51
#11363
Finish
26.22 mi13:54:273:27:137:558:08
7:59
#11363
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi89787585758510523(Top 40%)8421(Top 55%)8421(Top 374%)
10K6.21 mi3.10 mi9971-9938130-5458130-54511033(Top 41%)8693(Top 57%)8693(Top 386%)
15K9.32 mi3.11 mi10155-1848256-1268256-12610523(Top 40%)8421(Top 55%)8421(Top 374%)
20K12.43 mi3.11 mi10303-1488312-568312-5610816(Top 41%)8482(Top 56%)8482(Top 377%)
Half13.11 mi0.68 mi10351-488336-248336-2411168(Top 42%)8700(Top 57%)8700(Top 386%)
25K15.53 mi2.42 mi10742-3918510-1748510-17412957(Top 49%)9328(Top 61%)9328(Top 414%)
30K18.64 mi3.11 mi10954-2128560-508560-5012234(Top 46%)8897(Top 59%)8897(Top 395%)
20M20.00 mi1.36 mi11033-798563-38563-312194(Top 46%)8786(Top 58%)8786(Top 390%)
21M21.00 mi1.00 mi11096-638571-88571-812338(Top 46%)8730(Top 58%)8730(Top 388%)
35K21.75 mi0.75 mi11154-588588-178588-1712678(Top 48%)8842(Top 58%)8842(Top 393%)
23M23.00 mi1.25 mi11168-148566+228566+2211615(Top 44%)8289(Top 55%)8289(Top 368%)
24M24.00 mi1.00 mi11266-988591-258591-2512905(Top 48%)8797(Top 58%)8797(Top 391%)
40K24.85 mi0.85 mi11366-1008610-198610-1913786(Top 52%)9139(Top 60%)9139(Top 406%)
25.2M25.20 mi0.35 mi11363+38598+128598+1211529(Top 43%)8043(Top 53%)8043(Top 357%)
Finish26.22 mi1.02 mi113638573+258573+2511960(Top 45%)8258(Top 54%)8258(Top 367%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 40%
×21story building
+97ft-345ft

Overall

10523

Males

8421

M45-49

8421

5K→10K

3.1 - 6.2 mi

Top 41%
×5story building
+79ft-138ft

Overall

11033

Males

8693

M45-49

8693

10K→15K

6.2 - 9.3 mi

Top 40%
×3story building
+67ft-78ft

Overall

10523

Males

8421

M45-49

8421

15K→20K

9.3 - 12.4 mi

Top 41%
×5story building
+106ft-86ft

Overall

10816

Males

8482

M45-49

8482

20K→Half

12.4 - 13.1 mi

Top 42%
×2story building
+19ft-37ft

Overall

11168

Males

8700

M45-49

8700

Half→25K

13.1 - 15.5 mi

Top 49%
×4story building
+66ft-88ft

Overall

12957

Males

9328

M45-49

9328

25K→30K

15.5 - 18.6 mi

Top 46%
×9story building
+181ft-148ft

Overall

12234

Males

8897

M45-49

8897

30K→20M

18.6 - 20.0 mi

Top 46%
×5story building
+64ft-50ft

Overall

12194

Males

8786

M45-49

8786

20M→21M

20.0 - 21.0 mi

Top 46%
×8story building
+106ft-24ft

Overall

12338

Males

8730

M45-49

8730

21M→35K

21.0 - 21.8 mi

Top 48%
×7story building
+17ft-86ft

Overall

12678

Males

8842

M45-49

8842

35K→23M

21.8 - 23.0 mi

Top 44%
×5story building
+23ft-63ft

Overall

11615

Males

8289

M45-49

8289

23M→24M

23.0 - 24.0 mi

Top 48%
×6story building
+12ft-82ft

Overall

12905

Males

8797

M45-49

8797

24M→40K

24.0 - 24.9 mi

Top 52%
×1story
+6ft-20ft

Overall

13786

Males

9139

M45-49

9139

40K→25.2M

24.9 - 25.2 mi

Top 43%
×1story
+13ft-16ft

Overall

11529

Males

8043

M45-49

8043

25.2M→Finish

25.2 - 26.2 mi

Top 45%
×2story building
+22ft-21ft

Overall

11960

Males

8258

M45-49

8258

Passing Analysis

Category:
Athletes Passed
867*
Passed By
3250
Net Change
-2385
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8978
5K → 10K501043-993#8978#9971
10K → 15K123305-184#9971#10155
15K → 20K107*255-148#10155#10303
20K → Half1159-48#10303#10351
Half → 25K40431-391#10351#10742
25K → 30K123335-212#10742#10954
30K → 20M65*144-79#10954#11033
20M → 21M56119-63#11033#11096
21M → 35K2684-58#11096#11154
35K → 23M8397-14#11154#11168
23M → 24M41139-98#11168#11266
24M → 40K36136-100#11266#11366
40K → 25.2M3330+3#11366#11363
25.2M → Finish73730#11363#11363
TOTALS867*3250-2385

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

📊

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