Boston Marathon logo
BOSTON MARATHON 2023

Paul Nielsen

Bib: 21915•M

CO

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M60-64)
#0 / 1110
Top 44%
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
8:21/mi
25:57
↑ 97↓ 3451.5%
10K· 6.21 mi
8:23/mi
51:59
↑ 79↓ 1380.4%
15K· 9.32 mi
8:36/mi
1:18:42
↑ 67↓ 78
20K· 12.43 mi
8:16/mi
1:44:24
↑ 106↓ 860.1%
Half· 13.11 mi
8:32/mi
1:50:13
↑ 19↓ 370.5%
25K· 15.53 mi
8:30/mi
2:10:50
↑ 66↓ 880.2%
30K· 18.64 mi
9:17/mi
2:39:39
↑ 181↓ 1480.2%
20M
9:21/mi
2:52:22
↑ 64↓ 500.2%
21M
9:47/mi
3:02:09
↑ 106↓ 241.6%
35K· 21.75 mi
8:51/mi
3:08:46
↑ 17↓ 861.7%
23M
8:55/mi
3:19:56
↑ 23↓ 630.6%
24M
8:28/mi
3:28:24
↓ 821.3%
40K· 24.85 mi
8:33/mi
3:35:43
↓ 200.3%
25.2M
9:05/mi
3:38:51
↑ 13↓ 160.2%
Finish· 26.22 mi
8:13/mi
3:47:13
↑ 22↓ 21

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:50:13
Pace8:24 /mi
2nd Half
Distance13.11 mi
Time1:57:00
Pace8:56 /mi
📊Positive Split: 6.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:3325:578:2125:57
8:21
-
10K
6.21 mi11:45:3551:598:2226:02
8:23
+0:02
15K
9.32 mi12:12:181:18:428:2726:43
8:36
+0:13
20K
12.43 mi12:38:001:44:248:2425:42
8:16
-0:20
Half
13.11 mi12:43:491:50:138:245:49
8:32
+0:16
25K
15.53 mi13:04:262:10:508:2520:37
8:30
-0:02
30K
18.64 mi13:33:152:39:398:3428:49
9:17
+0:47
20M
20.00 mi13:45:582:52:228:3712:43
9:21
+0:04
21M
21.00 mi13:55:453:02:098:409:47
9:47
+0:26
35K
21.75 mi14:02:223:08:468:416:37
8:51
-0:56
23M
23.00 mi14:13:323:19:568:4211:10
8:55
+0:04
24M
24.00 mi14:22:003:28:248:418:28
8:28
-0:27
40K
24.85 mi14:29:193:35:438:417:19
8:33
+0:05
25.2M
25.20 mi14:32:273:38:518:413:08
9:05
+0:32
Finish
26.22 mi14:40:493:47:138:408:22
8:13
-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

8:13 /mi

Average Pace

8:40 /mi

Slowest Pace

9:47 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:52:46

76% of race

Time at Steady Pace

44:40

20% of race

Time at Slower Pace

9:47

4% of race

Average Pace: 8:40 /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 mi11:19:3325:578:2125:57
8:21
#16508
10K
6.21 mi11:45:3551:598:2226:02
8:23
#16962
15K
9.32 mi12:12:181:18:428:2726:43
8:36
#17482
20K
12.43 mi12:38:001:44:248:2425:42
8:16
#16946
Half
13.11 mi12:43:491:50:138:245:49
8:32
#16997
25K
15.53 mi13:04:262:10:508:2520:37
8:30
#16872
30K
18.64 mi13:33:152:39:398:3428:49
9:17
#17143
20M
20.00 mi13:45:582:52:228:3712:43
9:21
#17239
21M
21.00 mi13:55:453:02:098:409:47
9:47
#17228
35K
21.75 mi14:02:223:08:468:416:37
8:51
#17226
23M
23.00 mi14:13:323:19:568:4211:10
8:55
#17116
24M
24.00 mi14:22:003:28:248:418:28
8:28
#17004
40K
24.85 mi14:29:193:35:438:417:19
8:33
#16866
25.2M
25.20 mi14:32:273:38:518:413:08
9:05
#16806
Finish
26.22 mi14:40:493:47:138:408:22
8:13
#16678
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi16508108821088218423(Top 69%)11650(Top 77%)11650(Top 1050%)
10K6.21 mi3.10 mi16962-45411053-17111053-17117432(Top 65%)11264(Top 74%)11264(Top 1015%)
15K9.32 mi3.11 mi17482-52011254-20111254-20118423(Top 69%)11650(Top 77%)11650(Top 1050%)
20K12.43 mi3.11 mi16946+53611030+22411030+22415426(Top 58%)10427(Top 69%)10427(Top 939%)
Half13.11 mi0.68 mi16997-5111045-1511045-1517805(Top 67%)11411(Top 75%)11411(Top 1028%)
25K15.53 mi2.42 mi16872+12510976+6910976+6916211(Top 61%)10626(Top 70%)10626(Top 957%)
30K18.64 mi3.11 mi17143-27111076-10011076-10018499(Top 69%)11559(Top 76%)11559(Top 1041%)
20M20.00 mi1.36 mi17239-9611097-2111097-2118252(Top 69%)11348(Top 75%)11348(Top 1022%)
21M21.00 mi1.00 mi17228+1111078+1911078+1917176(Top 65%)10862(Top 72%)10862(Top 979%)
35K21.75 mi0.75 mi17226+211064+1411064+1417148(Top 64%)10767(Top 71%)10767(Top 970%)
23M23.00 mi1.25 mi17116+11011009+5511009+5515618(Top 59%)10076(Top 66%)10076(Top 908%)
24M24.00 mi1.00 mi17004+11210936+7310936+7314264(Top 54%)9430(Top 62%)9430(Top 850%)
40K24.85 mi0.85 mi16866+13810862+7410862+7413689(Top 51%)9109(Top 60%)9109(Top 821%)
25.2M25.20 mi0.35 mi16806+6010833+2910833+2912990(Top 49%)8770(Top 58%)8770(Top 790%)
Finish26.22 mi1.02 mi16678+12810771+6210771+6213488(Top 51%)9020(Top 59%)9020(Top 813%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 69%
×21story building
+97ft-345ft

Overall

18423

Males

11650

M60-64

11650

5K→10K

3.1 - 6.2 mi

Top 65%
×5story building
+79ft-138ft

Overall

17432

Males

11264

M60-64

11264

10K→15K

6.2 - 9.3 mi

Top 69%
×3story building
+67ft-78ft

Overall

18423

Males

11650

M60-64

11650

15K→20K

9.3 - 12.4 mi

Top 58%
×5story building
+106ft-86ft

Overall

15426

Males

10427

M60-64

10427

20K→Half

12.4 - 13.1 mi

Top 67%
×2story building
+19ft-37ft

Overall

17805

Males

11411

M60-64

11411

Half→25K

13.1 - 15.5 mi

Top 61%
×4story building
+66ft-88ft

Overall

16211

Males

10626

M60-64

10626

25K→30K

15.5 - 18.6 mi

Top 69%
×9story building
+181ft-148ft

Overall

18499

Males

11559

M60-64

11559

30K→20M

18.6 - 20.0 mi

Top 69%
×5story building
+64ft-50ft

Overall

18252

Males

11348

M60-64

11348

20M→21M

20.0 - 21.0 mi

Top 65%
×8story building
+106ft-24ft

Overall

17176

Males

10862

M60-64

10862

21M→35K

21.0 - 21.8 mi

Top 64%
×7story building
+17ft-86ft

Overall

17148

Males

10767

M60-64

10767

35K→23M

21.8 - 23.0 mi

Top 59%
×5story building
+23ft-63ft

Overall

15618

Males

10076

M60-64

10076

23M→24M

23.0 - 24.0 mi

Top 54%
×6story building
+12ft-82ft

Overall

14264

Males

9430

M60-64

9430

24M→40K

24.0 - 24.9 mi

Top 51%
×1story
+6ft-20ft

Overall

13689

Males

9109

M60-64

9109

40K→25.2M

24.9 - 25.2 mi

Top 49%
×1story
+13ft-16ft

Overall

12990

Males

8770

M60-64

8770

25.2M→Finish

25.2 - 26.2 mi

Top 51%
×2story building
+22ft-21ft

Overall

13488

Males

9020

M60-64

9020

Passing Analysis

Category:
Athletes Passed
1851
Passed By
2021
Net Change
-170
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16508
5K → 10K142596-454#16508#16962
10K → 15K58578-520#16962#17482
15K → 20K55216+536#17482#16946
20K → Half1162-51#16946#16997
Half → 25K17651+125#16997#16872
25K → 30K105376-271#16872#17143
30K → 20M45141-96#17143#17239
20M → 21M10190+11#17239#17228
21M → 35K4442+2#17228#17226
35K → 23M13828+110#17226#17116
23M → 24M12917+112#17116#17004
24M → 40K1435+138#17004#16866
40K → 25.2M655+60#16866#16806
25.2M → Finish14214+128#16806#16678
TOTALS18512021-170
📊

Passing Visuals

Category:
Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing