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SF MARATHON 1ST HALF 2023

Mason Jeffers

Sacramento, CA

Bib: 13058 M 21

0:00
0:00
/ mi
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Overall
#0 / 6072
Top 29%
Gender (Male)
#0 / 3331
Top 37%
M20-29
#0 / 333
Race Day Weather
60°/50°F
overcast clouds

Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
10 ft elev
1.40M
9:09/mi
12:49
→ flat
11 ft elev
2.13M
18:46/mi
26:31
→ flat
13 ft elev
6.43M
11:02/mi
1:13:56
↑ 274↓ 780.9%
213 ft elev
6.62M
-33:-36/mi
1:07:44
↑ 161.6%
239 ft elev
10.65M
9:10/mi
1:44:39
↑ 153↓ 3611.0%
48 ft elev
Finish· 13.11 mi
8:10/mi
2:04:43
↑ 244↓ 1141.0%
205 ft elev
Course Elevation
10–277 ft
≈
×22story building
•▲ 774 ft climb · ▼ 557 ft descent

The Course

Half Splits

1st Half· via 6.62M
1:07:4410:14 /mi+15.9%
2nd Half
56:598:47 /mi✓ faster
Negative split — 15.9% faster in the second half
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Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointTimeAvg PaceSegment LengthSegment TimeSegment PaceTrendDiff
1.40M
12:499:091.40 mi12:49
9:09
-
2.13M
26:3112:270.73 mi13:42
18:46
+9:37
6.43M
1:13:5611:304.30 mi47:25
11:02
-7:44
6.62M
1:07:4410:140.19 mi
-33:-36
-44:38
10.65M
1:44:399:504.03 mi36:55
9:10
+42:46
Finish(13.11 mi)
2:04:439:312.46 mi20:04
8:10
-1:00
Trend:
Faster pace
Steady pace
Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

-34:-36 /mi

Average Pace

9:31 /mi

Slowest Pace

18:46 /mi

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Fastest
Middle
Slowest
Average

Segments

Time at Faster Pace

2:04:43

100% of race

Time at Steady Pace

0:00

0% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 9:31 /mi

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Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

Heatmap

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0mi3.3mi6.6mi9.8mi13.1mi
Pace:
Faster
Steady
Slower

Checkpoint and Segment Rankings

CheckpointSeg. DistOverallMalesM20-29Seg. OverallSeg. MalesSeg. M20-29
1.40M1.40 mi2645174922326451749223
2.13M0.73 mi2624+211744+5224-127681813230
6.43M4.30 mi2123+5011455+289195+2919641356184
6.62M0.19 mi2174-511483-28200-5---
10.65M4.03 mi1989+1851372+111186+1418441293180
Finish(13.11 mi)2.46 mi1773+2161243+129179+71185876131

Segment Performance Analysis

Start → 1.40M

0.0 - 1.4 mi

Top 44%
~flat
+3ft-2ft

Overall

2645

Males

1749

M20-24

223

1.40M→2.13M

1.4 - 2.1 mi

Top 46%
~flat
+3ft-1ft

Overall

2768

Males

1813

M20-24

230

2.13M→6.43M

2.1 - 6.4 mi

Top 32%
×17story building
+274ft-78ft

Overall

1964

Males

1356

M20-24

184

6.43M→6.62M

6.4 - 6.6 mi

×1story
+16ft-0ft

Overall

-

Males

-

M20-24

-

6.62M→10.65M

6.6 - 10.7 mi

Top 30%
×21story building
+153ft-361ft

Overall

1844

Males

1293

M20-24

180

10.65M→Finish

10.7 - 13.1 mi

Top 20%
×17story building
+244ft-114ft

Overall

1185

Males

876

M20-24

131

Passing Analysis

Category:
Passed
1227*
Passed By
355
Net Change
+872
SegmentPassedPassed ByNet ChangeStart RankEnd Rank
Start → 1.40M----#2645
1.40M → 2.13M177156+21#2645#2624
2.13M → 6.43M564*63+501#2624#2123
6.43M → 6.62M3687-51#2123#2174
6.62M → 10.65M224*39+185#2174#1989
10.65M → Finish226*10+216#1989#1773
TOTALS1227*355+872

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

Passing Charts

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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

The San Francisco Marathon

The San Francisco Marathon

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